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Question (11)

QN0015757

If line l is perpendicular to line m, then the angle between them is:

(A) Acute
(B) Obtuse
(C) Reflex
(D) Right angle

Correct Answer: D

Explanation:

Perpendicular lines form right angles.

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Question (12)

QN0015758

A horizontal line and a vertical line on graph paper are usually:

(A) Parallel
(B) Perpendicular
(C) Coincident
(D) Curved

Correct Answer: B

Explanation:

They intersect at 90°.

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Question (13)

QN0015759

Two lines intersect forming four equal angles. The sum of any two adjacent angles is:

(A) 90°
(B) 120°
(C) 180°
(D) 360°

Correct Answer: C

Explanation:

90° + 90° = 180°.

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Question (14)

QN0015760

If one line is vertical and another is horizontal on the same plane, they are:

(A) Parallel
(B) Perpendicular
(C) Intersecting but not perpendicular
(D) Coincident

Correct Answer: B

Explanation:

Vertical and horizontal lines meet at right angles.

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Question (15)

QN0015761

Which of the following is NOT an example of perpendicular lines?

(A) Adjacent sides of a square
(B) Adjacent sides of a rectangle
(C) Two railway tracks
(D) Horizontal and vertical grid lines

Correct Answer: C

Explanation:

Railway tracks are parallel.

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Question (16)

QN0015762

Two lines intersect forming four equal angles. What is the measure of all four angles together?

(A) 180°
(B) 270°
(C) 360°
(D) 720°

Correct Answer: C

Explanation:

Angles around a point sum to 360°.

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Question (17)

QN0015763

If a line is perpendicular to another line, the two lines must:

(A) Never meet
(B) Meet at exactly one point
(C) Have equal lengths
(D) Be parallel

Correct Answer: B

Explanation:

Perpendicular lines intersect at one point.

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Question (18)

QN0015764

The corners of a rectangular playground illustrate which type of angle?

(A) Acute angle
(B) Obtuse angle
(C) Reflex angle
(D) Right angle

Correct Answer: D

Explanation:

Rectangles have right-angled corners.

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Question (19)

QN0015765

If four equal angles are formed at an intersection, each angle is:

(A) 45°
(B) 60°
(C) 90°
(D) 120°

Correct Answer: C

Explanation:

360° ÷ 4 = 90°.

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Question (20)

QN0015766

A road running east-west crosses another road running north-south. The roads are:

(A) Parallel
(B) Perpendicular
(C) Coincident
(D) Curved

Correct Answer: B

Explanation:

East-west and north-south directions form right angles.

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Question (11)

If line l is perpendicular to line m, then the angle between them is:

Explanation:

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Question (12)

A horizontal line and a vertical line on graph paper are usually:

Explanation:

Link:

Question (13)

Two lines intersect forming four equal angles. The sum of any two adjacent angles is:

Explanation:

Link:

Question (14)

If one line is vertical and another is horizontal on the same plane, they are:

Explanation:

Link:

Question (15)

Which of the following is NOT an example of perpendicular lines?

Explanation:

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Question (16)

Two lines intersect forming four equal angles. What is the measure of all four angles together?

Explanation:

Link:

Question (17)

If a line is perpendicular to another line, the two lines must:

Explanation:

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Question (18)

The corners of a rectangular playground illustrate which type of angle?

Explanation:

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Question (19)

If four equal angles are formed at an intersection, each angle is:

Explanation:

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Question (20)

A road running east-west crosses another road running north-south. The roads are:

Explanation:

Link:

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