Title: Classify Angles
Course: quiz duplicate error

Q: Classify the angle as acute, right, obtuse, or straight.

[Image]
- Obtuse (correct)
- Straight (incorrect)
- Acute (incorrect)
- Right (incorrect)
A: Obtuse

Q: What is the measure of the angle that is supplementary to a 151° angle?
- 119° (incorrect)
- 209° (incorrect)
- 29° (correct)
- not possible (incorrect)
A: 29°

Q: Fill in the blank.

[Image] angle has a measure of 180°.
- An acute (incorrect)
- An obtuse (incorrect)
- A straight (correct)
- A right (incorrect)
A: A straight

Q: Find the indicated angle.

[Image]
Identify the pair or pairs of complementary angles.
- [Image]DBE and [Image]EBF (incorrect)
- [Image]ABD and [Image]FBC; [Image]DBE and [Image]EBF (correct)
- [Image]ABD and [Image]EBF; [Image]DBE and [Image]FBC (incorrect)
- [Image]ABD and [Image]FBC (incorrect)
A: [Image]ABD and [Image]FBC; [Image]DBE and [Image]EBF

Q: Tell whether the angle is acute, right, obtuse, or straight.

[Image]
- Acute (incorrect)
- Straight (incorrect)
- Obtuse (correct)
- Right (incorrect)
A: Obtuse

Q: Tell whether the angle is acute, right, obtuse, or straight.

[Image]
- Obtuse (incorrect)
- Straight (incorrect)
- Right (correct)
- Acute (incorrect)
A: Right

Q: Classify the angle as acute, right, obtuse, or straight.

[Image]
- Right (correct)
- Obtuse (incorrect)
- Straight (incorrect)
- Acute (incorrect)
A: Right

Q: Classify the angle as acute, right, obtuse, or straight.

[Image]
- Obtuse (incorrect)
- Acute (correct)
- Right (incorrect)
- Straight (incorrect)
A: Acute

Q: Tell whether the angle is acute, right, obtuse, or straight.

[Image]
- Right (incorrect)
- Acute (incorrect)
- Straight (incorrect)
- Obtuse (correct)
A: Obtuse

Q: Classify the angle as acute, right, obtuse, or straight.

[Image]
- Acute (incorrect)
- Obtuse (correct)
- Straight (incorrect)
- Right (incorrect)
A: Obtuse

Q: Find the indicated angle.

Identify the pairs of supplementary angles.
[Image]
- [Image]ABD and [Image]EBF (incorrect)
- [Image]ABE and [Image]DBF (incorrect)
- [Image]ABE and [Image]ABD; [Image]ABE and [Image]EBF; [Image]DBF and [Image]EBF; [Image]DBF and [Image]ABD (correct)
- There are no pairs of supplementary angles. (incorrect)
A: [Image]ABE and [Image]ABD; [Image]ABE and [Image]EBF; [Image]DBF and [Image]EBF; [Image]DBF and [Image]ABD

Q: Tell whether the angle is acute, right, obtuse, or straight.

[Image]
- Right (incorrect)
- Obtuse (correct)
- Straight (incorrect)
- Acute (incorrect)
A: Obtuse

Q: Tell whether the angle is acute, right, obtuse, or straight.

[Image]
- Right (incorrect)
- Obtuse (incorrect)
- Acute (correct)
- Straight (incorrect)
A: Acute

Q: What is the measure of the angle that is complementary to a 45° angle?
- 45° (correct)
- 225° (incorrect)
- 315° (incorrect)
- 135° (incorrect)
A: 45°

Q: Tell whether the angle is acute, right, obtuse, or straight.

[Image]ADB
   [Image]
- Acute (correct)
- Right (incorrect)
- Straight (incorrect)
- Obtuse (incorrect)
A: Acute

Q: Classify the angle as acute, right, obtuse, or straight.

[Image]
- Straight (incorrect)
- Right (incorrect)
- Acute (correct)
- Obtuse (incorrect)
A: Acute

Q: Fill in the blank.

The measure of a right angle is [Image].
- between 90° and 180° (incorrect)
- 90° (correct)
- between 0° and 90° (incorrect)
- 80° (incorrect)
A: 90°

Q: Find the measure of an angle that is supplementary to 79°.
- 281° (incorrect)
- 191° (incorrect)
- 11° (incorrect)
- 101° (correct)
A: 101°

Q: Tell whether the angle is acute, right, obtuse, or straight.

[Image]
- Acute (incorrect)
- Straight (incorrect)
- Right (correct)
- Obtuse (incorrect)
A: Right

Q: Tell whether the angle is acute, right, obtuse, or straight.

[Image]
- Acute (correct)
- Straight (incorrect)
- Right (incorrect)
- Obtuse (incorrect)
A: Acute

Q: Classify the angle as acute, right, obtuse, or straight.

[Image]
- Right (correct)
- Acute (incorrect)
- Straight (incorrect)
- Obtuse (incorrect)
A: Right

Q: Classify the angle as acute, right, obtuse, or straight.

[Image]
- Right (incorrect)
- Straight (correct)
- Acute (incorrect)
- Obtuse (incorrect)
A: Straight

Q: Tell whether the angle is acute, right, obtuse, or straight.

[Image]ADB
   [Image]
- Obtuse (correct)
- Straight (incorrect)
- Acute (incorrect)
- Right (incorrect)
A: Obtuse

Q: A roof is inclined at an angle of 21.32°. Find the measure of the angle that is complementary to this angle.
- 68.68° (correct)
- 68.78° (incorrect)
- 69.78° (incorrect)
- 69.68° (incorrect)
A: 68.68°

Q: Tell whether the angle is acute, right, obtuse, or straight.

[Image]ADB
   [Image]
- Straight (correct)
- Acute (incorrect)
- Right (incorrect)
- Obtuse (incorrect)
A: Straight

Q: Fill in the blank.

[Image] angle measures between 0° and 90°.
- An obtuse (incorrect)
- An acute (correct)
- A straight (incorrect)
- A right (incorrect)
A: An acute

Q: Find the indicated angle.

Find the complement of 174°.
- 6° (incorrect)
- 174° (incorrect)
- 84° (incorrect)
- not possible (correct)
A: not possible

Q: Write an equation to find x in the following figure:

[Image: 60 -120 equation]
- x + 2x = 90 (Incorrect. The two angles are a linear pair.)
- x = 2x (Incorrect. The two angles are not equal.)
- x + 2x = 180 (Correct)
A: x + 2x = 180

Q: What are the measures of the two angles in the figure?

[Image: 60 -120 equation]
- 90° and 90° (Incorrect. The two angles are not equal.)
- 60° and 120° (Nice work.)
- 30° and 60° (Incorrect. Those only add up to 90°)
- 80° and 160° (Incorrect. That would be a total of 240°)
A: 60° and 120°

Q: Solve for x:

[Image: 60-120 Angle]
A: x = 60 / x=60 / x =60 / x= 60
Partly right: 60 (75%)
Feedback ("60"): You need to write x =

Q: ∠DCB is a right angle. Write an equation to find y:

[Image: complementary equation]
- y + 15 + y + 25 = 180 (Incorrect. The two angles are not supplementary.)
- y + 15 + y + 25 = 90 (Great job!)
- y + 15 = y + 25 (Incorrect. The two angles are not equal.)
- 90 - y + 15 = y + 25 (Incorrect. You would need to put the y + 15 in parentheses for that equation to work.)
A: y + 15 + y + 25 = 90

Q: ∠DCB is a right angle. Solve for y:

[Image: complementary]
A: y = 25 / y=25 / y =25 / y= 25
Partly right: 25 (75%)
Feedback ("25"): You need to write y =

Q: ∠DCB is a right angle. What is m∠DCE?

[Image: complementary equation]
- 60° (Incorrect. Try again.)
- 40° (That's it!)
- 50° (Incorrect. It is the smaller of the two angles.)
- 15° (Incorrect. Check your solution for x.)
A: 40°

Q: Write an equation to find v in the following figure:

[Image: full circle angle]
- 124 + 86 = 2v + v (Incorrect. Those two angles are not vertical angles.)
- 2v + v + 124 + 86 = 180 (Incorrect. The total is more than 180°.)
- 2v + v + 124 + 86 = 360 (Correct!)
- 2v = 86 (Incorrect. Those two angles are not vertical angles.)
A: 2v + v + 124 + 86 = 360

Q: What is m∠MLP?

[Image: full circle angle]
- 86° (Incorrect. Those two angles are not vertical angles.)
- 50° (Incorrect. ∠MLP is not the angle that equals v.)
- 100° (Correct!)
- 124° (Incorrect. Those two angles are not vertical angles.)
A: 100°

Q: Solve for v:

[Image: full circle angle]
A: v = 50 / v=50 / v =50 / v= 50
Partly right: 50 (75%)
Feedback ("50"): Don't forget the v =

Q: Write an equation to solve for w in the following figure:

[Image: verticaleq]
- 3w + 5 = 145 (Incorrect. You need the 20° as well.)
- 3w + 5 + 20 = 145 (Good eye!)
- 3w + 5 = 20 (Incorrect. Those two angles are not equal.)
- 3w + 5 + 20 = 180 (Incorrect. Those two angles do not form a line.)
A: 3w + 5 + 20 = 145

Q: What is m∠KJH?

[Image: verticaleq]
- 145° (Incorrect. Those two angles are not vertical angles.)
- 125° (Excellent!)
- 120° (Incorrect. Check your value for w.)
- 160° (Incorrect. Those two angles do not form a line.)
A: 125°

Q: Solve for w:

[Image: vertical problem]
A: w = 40 / w=40 / w= 40 / w =40
Partly right: 40 (75%)
Feedback ("40"): Don't forget the w =

Q: Write an equation to find z in the following diagram:

[Image: verticaleq1]
- 5z + 6 = 131
- 180 = 5z + 6 + 131 (Incorrect. Those two angles do not equal 180°.)
- 5z + 6 = 180 (Incorrect. The angle is obtuse, not straight.)
A: 5z + 6 = 131

Q: What is m∠QUS?

[Image: verticaleq1]
- 131°
- 34° (Incorrect. It is an obtuse angle.)
- 174° (Incorrect.)
A: 131°

Q: Solve for z:

[Image: vertical]
A: z = 25 / z= 25 / z=25 / z =25
Partly right: 25 (75%)
Feedback ("25"): Don't forget the z =

Q: Write an equation to find the angle of departure, x, of the pool ball:

[Image: pool table angles]

CC-BY-SA SMcCandlish via Wikimedia Commons
- x + x - 90 = 180 (Incorrect. You need to add the 90°)
- 90 - x - x = 180 (Incorrect. You need to add the x's.)
- 90 + x + x = 180 (Correct.)
- x + x = 180 (Incorrect. What about the 90°?)
A: 90 + x + x = 180

Q: What is the angle of departure, x, of the pool ball?

[Image: pool table angles]

CC-BY-SA SMcCandlish via Wikimedia Commons
- 45° (Correct. The angle of departure and the angle of approach are equal.)
- 90° (Incorrect. Solve for x.)
- 60° (Incorrect. Solve for x.)
- 22.5° (Incorrect. The two x's should add up to 90°.)
A: 45°

Q: Find the measure of  p

[Image: missing complementary angle; other angle 55 degrees]
- p = 55° (Those two angles are not congruent.)
- p = 35° (Correct.)
- p = 90° (p is only a part of the right angle)
- p = 125° (p is part of a right angle)
A: p = 35°

Q: Find the measure of  r

[Image: missing complementary angle; other angle 55 degrees]
- r = 55° (r is vertical angles with the angle that is 55 degrees.)
- r = 35° (Correct.)
- r = 90° (r is an acute angle)
- r = 125° (You need to subtract the 90 degree angle.)
A: r = 35°

Q: What equation will help you solve for x in the following figure?

[Image: angle equation line]
- 2x + 4x + 10 = 20 (I don't think the two bigger angles will equal 20°)
- 2x + 4x + 10 + 20 = 180
- 2x + 4x = 90 (There isn't a right angle in the figure.)
- 2x = 20 (Those two angles are not vertical angles. Look at the line instead.)
A: 2x + 4x + 10 + 20 = 180

Q: Solve for x:

[Image: angle equation line]
- x = 20
- x = 25
- x = 5 (Don't add x's to ones.)
- x = 50
A: x = 25

Q: What is the m∠DAB?

[Image: angle equation line]
- 20°
- 50°
- 110°
- 100°
A: 110°

Q: Which pair of angles is supplementary?

[Image: Identify angles]
- ∠CUP and ∠PUT
- ∠PUT and ∠CUM
- ∠CUM and ∠MUC
- ∠CUP and ∠MUT
A: ∠CUP and ∠PUT

Q: Which is a pair of complementary angles?

[Image: Identify complementary angles]
- ∠PEN and ∠LEP
- ∠KET and ∠LEK
- ∠TEN and ∠NEP
- ∠NEP and ∠PEN
A: ∠TEN and ∠NEP

Q: Find the measure of a.

[Image: missing angles intersecting lines]
- a = 125°
- a = 35°
- a = 55°
- a = 235°
A: a = 125°

Q: Find the measure of b.

[Image: missing angles intersecting lines]
- b = 125°
- b = 35°
- b = 55°
- b = 235°
A: b = 55°

Q: Which equation will help you solve for x in the following figure?

[Image: solve for x complementary angles]
- x + 5 + x - 5 = 180
- x + 5 = x - 5
- 180 - (x + 5) = x - 5
- x + 5 + x - 5 = 90
A: x + 5 + x - 5 = 90

Q: Solve for x.

[Image: solve for x complementary angles]
- x = 50°
- x = 45°
- x = 40°
- x = 90°
A: x = 45°

Q: What is the measure of ∠NAB?

[Image: solve for x complementary angles]
- 50°
- 45°
- 40°
- 90°
A: 40°