Question

[2 marks]

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Solution

The correct option is **B** Both A and R are true, and R is not the correct explanation for A.

The correct option is B.

Consider assertion (A) statement.

The external angle of a triangle = sum of opposite interior angles. It is given that two interior opposite angles of a triangle are equal.

[0.5 marks]

Let x be the measure of each of the interior opposite angles.

110° = x + x (by exterior angle property)

110° = 2x

55° = x

Consider reason (A) statement.

[0.5 marks]

A triangle with one of its angle 90°, is called a right triangle.

A and R both are correct, but the R is not an explanation of the A.

Hence, option (B) is the correct answer.

[1 mark]

The correct option is B.

Consider assertion (A) statement.

The external angle of a triangle = sum of opposite interior angles. It is given that two interior opposite angles of a triangle are equal.

[0.5 marks]

Let x be the measure of each of the interior opposite angles.

110° = x + x (by exterior angle property)

110° = 2x

55° = x

Consider reason (A) statement.

[0.5 marks]

A triangle with one of its angle 90°, is called a right triangle.

A and R both are correct, but the R is not an explanation of the A.

Hence, option (B) is the correct answer.

[1 mark]

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