Default Title

Question (31)

QN0030183

The vertex angle of an isosceles triangle is 84°. What is each base angle?

(A) 42°
(B) 48°
(C) 52°
(D) 58°

Correct Answer: B

Explanation:

Each base angle = (180° − 84°) ÷ 2 = 48°.

Link:

Report Error

Question (32)

QN0030184

The angles of an isosceles triangle are in the ratio 4 : 4 : 7. What is the measure of each equal angle?

(A) 40°
(B) 45°
(C) 48°
(D) 56°

Correct Answer: C

Explanation:

Total parts = 15. One part = 12°. Each equal angle = 4 × 12° = 48°.

Link:

Report Error

Question (33)

QN0030185

If all three sides of a triangle are equal, then each interior angle is:

(A) 45°
(B) 50°
(C) 60°
(D) 90°

Correct Answer: C

Explanation:

An equilateral triangle has three equal angles of 60° each.

Link:

Report Error

Question (34)

QN0030186

The vertex angle of an isosceles triangle is 30°. Each base angle is:

(A) 60°
(B) 70°
(C) 75°
(D) 80°

Correct Answer: C

Explanation:

(180° − 30°) ÷ 2 = 75°.

Link:

Report Error

Question (35)

QN0030187

Which statement is always true for an isosceles triangle?

(A) All three angles are equal.
(B) The base angles are equal.
(C) One angle is always 90°.
(D) All sides are unequal.

Correct Answer: B

Explanation:

The angles opposite the equal sides are always equal.

Link:

Report Error

Question (36)

QN0030188

The angles of an isosceles triangle are in the ratio 7 : 7 : 4. What is the vertex angle?

(A) 40°
(B) 50°
(C) 60°
(D) 70°

Correct Answer: A

Explanation:

Total parts = 18. One part = 10°. Vertex angle = 4 × 10° = 40°.

Link:

Report Error

Question (37)

QN0030189

An equilateral triangle has three equal angles. Their sum is:

(A) 90°
(B) 120°
(C) 180°
(D) 360°

Correct Answer: C

Explanation:

The sum of the interior angles of every triangle is 180°.

Link:

Report Error

Question (38)

QN0030190

In an isosceles triangle, each base angle is 41°. What is the vertex angle?

(A) 82°
(B) 88°
(C) 94°
(D) 98°

Correct Answer: D

Explanation:

180° − 41° − 41° = 98°.

Link:

Report Error

Question (39)

QN0030191

The angles of an isosceles triangle are in the ratio 6 : 6 : 3. What is the measure of the vertex angle?

(A) 30°
(B) 36°
(C) 48°
(D) 60°

Correct Answer: B

Explanation:

Total parts = 15. One part = 12°. Vertex angle = 3 × 12° = 36°.

Link:

Report Error

Question (40)

QN0030192

A triangle has all three angles equal to 60°. Which statement is correct?

(A) It is an isosceles triangle only.
(B) It is a scalene triangle.
(C) It is an equilateral triangle.
(D) It is a right triangle.

Correct Answer: C

Explanation:

A triangle with three equal angles of 60° is an equilateral triangle.

Link:

Report Error

Question (31)

The vertex angle of an isosceles triangle is 84°. What is each base angle?

Explanation:

Link:

Question (32)

The angles of an isosceles triangle are in the ratio 4 : 4 : 7. What is the measure of each equal angle?

Explanation:

Link:

Question (33)

If all three sides of a triangle are equal, then each interior angle is:

Explanation:

Link:

Question (34)

The vertex angle of an isosceles triangle is 30°. Each base angle is:

Explanation:

Link:

Question (35)

Which statement is always true for an isosceles triangle?

Explanation:

Link:

Question (36)

The angles of an isosceles triangle are in the ratio 7 : 7 : 4. What is the vertex angle?

Explanation:

Link:

Question (37)

An equilateral triangle has three equal angles. Their sum is:

Explanation:

Link:

Question (38)

In an isosceles triangle, each base angle is 41°. What is the vertex angle?

Explanation:

Link:

Question (39)

The angles of an isosceles triangle are in the ratio 6 : 6 : 3. What is the measure of the vertex angle?

Explanation:

Link:

Question (40)

A triangle has all three angles equal to 60°. Which statement is correct?

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY