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Question (21)

QN0016167

A perimeter of 54 cm belongs to an equilateral triangle. Each side is:

(A) 16 cm
(B) 18 cm
(C) 20 cm
(D) 22 cm

Correct Answer: B

Explanation:

54 ÷ 3 = 18 cm

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Question (22)

QN0016168

Which figure is certainly an equilateral triangle?

(A) Sides 11 cm, 11 cm, 11 cm
(B) Sides 11 cm, 11 cm, 12 cm
(C) Sides 10 cm, 11 cm, 12 cm
(D) Sides 9 cm, 10 cm, 9 cm

Correct Answer: A

Explanation:

All three sides are equal.

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Question (23)

QN0016169

The point where the two arcs meet while constructing an equilateral triangle becomes:

(A) Centre of triangle
(B) Third vertex
(C) Midpoint of base
(D) Perimeter point

Correct Answer: B

Explanation:

The intersection point is the third vertex.

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Question (24)

QN0016170

If each side of an equilateral triangle is increased by 3 cm from 5 cm, the new perimeter is:

(A) 15 cm
(B) 18 cm
(C) 21 cm
(D) 24 cm

Correct Answer: D

Explanation:

New side = 8 cm, perimeter = 24 cm.

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Question (25)

QN0016171

A triangle with sides 14 cm, 14 cm and 14 cm is:

(A) Scalene
(B) Isosceles only
(C) Equilateral
(D) Right triangle

Correct Answer: C

Explanation:

All sides are equal.

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Question (26)

QN0016172

Which set of side lengths can be used directly to construct an equilateral triangle?

(A) 6 cm, 6 cm, 6 cm
(B) 6 cm, 6 cm, 8 cm
(C) 5 cm, 6 cm, 7 cm
(D) 4 cm, 4 cm, 5 cm

Correct Answer: A

Explanation:

All three sides are equal.

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Question (27)

QN0016173

If the side length of an equilateral triangle is halved from 12 cm to 6 cm, its perimeter becomes:

(A) 6 cm
(B) 12 cm
(C) 18 cm
(D) 24 cm

Correct Answer: C

Explanation:

6 × 3 = 18 cm.

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Question (28)

QN0016174

An equilateral triangle of side 20 cm has a perimeter of:

(A) 40 cm
(B) 50 cm
(C) 60 cm
(D) 80 cm

Correct Answer: C

Explanation:

20 × 3 = 60 cm.

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Question (29)

QN0016175

Which tool is essential for ensuring equal distances from two endpoints while constructing an equilateral triangle?

(A) Protractor
(B) Compass
(C) Divider
(D) Set square

Correct Answer: B

Explanation:

A compass is used to draw equal-radius arcs.

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Question (30)

QN0016176

If an equilateral triangle has side length x cm, its perimeter is:

(A) x cm
(B) 2x cm
(C) 3x cm
(D) 4x cm

Correct Answer: C

Explanation:

Perimeter = 3 × side.

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Question (21)

A perimeter of 54 cm belongs to an equilateral triangle. Each side is:

Explanation:

Link:

Question (22)

Which figure is certainly an equilateral triangle?

Explanation:

Link:

Question (23)

The point where the two arcs meet while constructing an equilateral triangle becomes:

Explanation:

Link:

Question (24)

If each side of an equilateral triangle is increased by 3 cm from 5 cm, the new perimeter is:

Explanation:

Link:

Question (25)

A triangle with sides 14 cm, 14 cm and 14 cm is:

Explanation:

Link:

Question (26)

Which set of side lengths can be used directly to construct an equilateral triangle?

Explanation:

Link:

Question (27)

If the side length of an equilateral triangle is halved from 12 cm to 6 cm, its perimeter becomes:

Explanation:

Link:

Question (28)

An equilateral triangle of side 20 cm has a perimeter of:

Explanation:

Link:

Question (29)

Which tool is essential for ensuring equal distances from two endpoints while constructing an equilateral triangle?

Explanation:

Link:

Question (30)

If an equilateral triangle has side length x cm, its perimeter is:

Explanation:

Link:

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