Q. 295.0( 1 Vote )

# In Δ PQR, if ∠P = 60°, and ∠Q = 40°, then the exterior angle formed by producing QR is equal to

A. 60°

B. 120°

C. 100°

D. 80°

Answer :

Exterior angle is sum of opposite interior angles

When QR is produced means exterior angle of ∠R

Having opposite angles ∠P and ∠Q

∴ exterior angle = ∠P + ∠Q

= 60° + 40° = 100°

Rate this question :

In a right-angled triangle, the angles other than the right angle are

NCERT - Exemplar MathematicsIn Fig. 6.34, find the measures of ∠PON and ∠NPO.

NCERT - Exemplar Mathematics

Find the values of x and y in Fig. 6.37. Plan a Strategy

NCERT - Exemplar Mathematics

In Δ ABC, if ∠A = ∠C, and exterior angle ABX = 140°, then find the angles of the triangle.

NCERT - Exemplar MathematicsIn a triangle ABC, the measure of angle A is 40° less than the measure of angle B and 50° less than that of angle C. Find the measure of ∠A.

NCERT - Exemplar MathematicsIn Fig. 6.31(i) and (ii), find the values of a, b and c.

NCERT - Exemplar Mathematics

In Fig. 6.30, find the value of x.

NCERT - Exemplar Mathematics

The measure of three angles of a triangle are in the ratio 5 : 3 : 1. Find the measures of these angles.

NCERT - Exemplar Mathematics