# Identifying Lines and Angles

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## Identifying Lines and Angles Answer Key

1.

This angle is obtuse.

- True
- False

2.

This angle is acute.

- True
- False

3.

Name the angle.

- acute
- obtuse
- right

4.

Name the angle.

- acute
- obtuse
- right

5.

Which shows a right angle?

6.

Which shows a pair of perpendicular lines?

7.

Which shows a pair of perpendicular lines?

8.

Which shows a pair of parallel lines?

9.

Which shows a pair of parallel lines?

10.

Which shows a pair of parallel lines?

11.

Which shows a pair of perpendicular lines?

12.

Which shows a pair of parallel lines?

13.

Which shows a pair of perpendicular lines?

14.

Which TWO shapes appear to have at least 2 sets of perpendicular lines?

15.

Which TWO statements about the angle shown are true?

- Angle ABC is acute.
- Angle ABC is obtuse.
- Angle ABC is less than [math]180deg.[/math]
- Angle ABC is equal to [math]180deg.[/math]
- Angle ABC is greater than [math]180deg.[/math]

16.

What type of angle is [math]angCAB[/math]?

- acute
- obtuse
- right
- straight

17.

In the figure shown, [math]angABC[/math] would best be described as .

- right
- acute
- obtuse
- straight

18.

Which of the following statements is true about the trapezoid shown?

- It has one set of parallel lines.
- It has two sets of parallel lines.
- It has one set of perpendicular lines.
- It has two sets of perpendicular lines.

19.

All the angles in the hexagon shown are .

- right
- acute
- obtuse
- straight

20.

Which angle is NOT formed by the intersecting lines shown?

- right
- acute
- obtuse
- both a and c

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