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Question (31)

QN0015777

Which of the following represents a real-life example of perpendicular lines used in engineering?

(A) Railway tracks
(B) Window frame corners
(C) Parallel road markings
(D) Ladder rungs and rails taken separately

Correct Answer: B

Explanation:

Window frame corners are designed using perpendicular lines forming right angles.

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Question (32)

QN0015778

Two lines intersect and form angles of 90°, 90°, 90°, and 90°. The sum of vertically opposite angles is:

(A) 90°
(B) 180°
(C) 270°
(D) 360°

Correct Answer: B

Explanation:

Vertically opposite angles are equal; here each is 90°, so their sum is 180°.

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Question (33)

QN0015779

Which property helps architects create rectangular rooms?

(A) Parallel lines only
(B) Curved lines
(C) Perpendicular lines forming right angles
(D) Coincident lines

Correct Answer: C

Explanation:

Rectangular rooms require adjacent sides to meet at right angles.

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Question (34)

QN0015780

In a coordinate grid, the x-axis and y-axis are:

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

Correct Answer: C

Explanation:

The x-axis and y-axis intersect at 90°, so they are perpendicular.

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Question (35)

QN0015781

A line forms four equal angles with another line. The measure of one such angle is obtained by:

(A) 180 ÷ 2
(B) 360 ÷ 2
(C) 360 ÷ 4
(D) 180 ÷ 4

Correct Answer: C

Explanation:

A full angle is 360°, divided into four equal parts gives 90° each.

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Question (36)

QN0015782

If two roads cross at right angles, the angle formed is:

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

Correct Answer: C

Explanation:

Perpendicular roads form a right angle of 90°.

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Question (37)

QN0015783

Which statement about perpendicular lines is correct?

(A) They are always equal in length
(B) They intersect to form right angles
(C) They never intersect
(D) They always have arrow markings

Correct Answer: B

Explanation:

Perpendicular lines always meet at 90°.

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Question (38)

QN0015784

If line l is perpendicular to line m, and line m is horizontal, line l must be:

(A) Parallel to m
(B) Horizontal
(C) Vertical
(D) Curved

Correct Answer: C

Explanation:

A vertical line is perpendicular to a horizontal line.

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Question (39)

QN0015785

The intersection of two perpendicular streets divides the area into how many right-angled regions?

(A) 2
(B) 3
(C) 4
(D) 5

Correct Answer: C

Explanation:

Perpendicular streets form four right-angled regions.

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Question (40)

QN0015786

Which contribution of geometry involving perpendicular lines is widely used in society?

(A) Designing right-angled buildings and roads
(B) Making circles only
(C) Measuring mass
(D) Studying weather patterns only

Correct Answer: A

Explanation:

Perpendicular lines are widely used in construction and road design for right angles.

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Question (31)

Which of the following represents a real-life example of perpendicular lines used in engineering?

Explanation:

Link:

Question (32)

Two lines intersect and form angles of 90°, 90°, 90°, and 90°. The sum of vertically opposite angles is:

Explanation:

Link:

Question (33)

Which property helps architects create rectangular rooms?

Explanation:

Link:

Question (34)

In a coordinate grid, the x-axis and y-axis are:

Explanation:

Link:

Question (35)

A line forms four equal angles with another line. The measure of one such angle is obtained by:

Explanation:

Link:

Question (36)

If two roads cross at right angles, the angle formed is:

Explanation:

Link:

Question (37)

Which statement about perpendicular lines is correct?

Explanation:

Link:

Question (38)

If line l is perpendicular to line m, and line m is horizontal, line l must be:

Explanation:

Link:

Question (39)

The intersection of two perpendicular streets divides the area into how many right-angled regions?

Explanation:

Link:

Question (40)

Which contribution of geometry involving perpendicular lines is widely used in society?

Explanation:

Link:

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