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Question (11)

QN0016157

An equilateral triangle has side length 15 cm. What is the sum of all its side lengths?

(A) 30 cm
(B) 45 cm
(C) 60 cm
(D) 75 cm

Correct Answer: B

Explanation:

15 × 3 = 45 cm

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Question (12)

QN0016158

During construction, the third vertex of an equilateral triangle is obtained at:

(A) Midpoint of base
(B) Intersection of two arcs
(C) End of base
(D) Centre of one arc

Correct Answer: B

Explanation:

The intersection of arcs gives the third vertex.

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Question (13)

QN0016159

In an equilateral triangle of side 9 cm, the length of each side is:

(A) Different
(B) Equal to 18 cm
(C) Equal to 9 cm
(D) Equal to 27 cm

Correct Answer: C

Explanation:

All sides are equal.

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Question (14)

QN0016160

Which set cannot represent an equilateral triangle?

(A) 2 cm, 2 cm, 2 cm
(B) 10 cm, 10 cm, 10 cm
(C) 4 cm, 4 cm, 5 cm
(D) 7 cm, 7 cm, 7 cm

Correct Answer: C

Explanation:

All three sides must be equal.

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Question (15)

QN0016161

If one side of an equilateral triangle is doubled from 4 cm to 8 cm, the new perimeter becomes:

(A) 12 cm
(B) 16 cm
(C) 20 cm
(D) 24 cm

Correct Answer: D

Explanation:

8 × 3 = 24 cm

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Question (16)

QN0016162

To construct an equilateral triangle of side 7 cm, the base drawn first should be:

(A) 5 cm
(B) 6 cm
(C) 7 cm
(D) Any length

Correct Answer: C

Explanation:

The base equals the required side length.

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Question (17)

QN0016163

A triangle has all sides equal to 13 cm. Its perimeter is:

(A) 26 cm
(B) 39 cm
(C) 52 cm
(D) 65 cm

Correct Answer: B

Explanation:

13 × 3 = 39 cm

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Question (18)

QN0016164

If the perimeter of an equilateral triangle is 75 cm, each side is:

(A) 15 cm
(B) 20 cm
(C) 25 cm
(D) 30 cm

Correct Answer: C

Explanation:

75 ÷ 3 = 25 cm

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Question (19)

QN0016165

Which statement about an equilateral triangle is always true?

(A) Exactly two sides are equal
(B) All three sides are equal
(C) No sides are equal
(D) One side is longer than the others

Correct Answer: B

Explanation:

Property of an equilateral triangle.

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Question (20)

QN0016166

In constructing an equilateral triangle of side 10 cm, each arc is drawn with radius:

(A) 5 cm
(B) 8 cm
(C) 10 cm
(D) 20 cm

Correct Answer: C

Explanation:

Radius equals side length.

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Question (11)

An equilateral triangle has side length 15 cm. What is the sum of all its side lengths?

Explanation:

Link:

Question (12)

During construction, the third vertex of an equilateral triangle is obtained at:

Explanation:

Link:

Question (13)

In an equilateral triangle of side 9 cm, the length of each side is:

Explanation:

Link:

Question (14)

Which set cannot represent an equilateral triangle?

Explanation:

Link:

Question (15)

If one side of an equilateral triangle is doubled from 4 cm to 8 cm, the new perimeter becomes:

Explanation:

Link:

Question (16)

To construct an equilateral triangle of side 7 cm, the base drawn first should be:

Explanation:

Link:

Question (17)

A triangle has all sides equal to 13 cm. Its perimeter is:

Explanation:

Link:

Question (18)

If the perimeter of an equilateral triangle is 75 cm, each side is:

Explanation:

Link:

Question (19)

Which statement about an equilateral triangle is always true?

Explanation:

Link:

Question (20)

In constructing an equilateral triangle of side 10 cm, each arc is drawn with radius:

Explanation:

Link:

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