Question

In a triangle if a pair of angles are complementary, then the triangle is a right-angled triangle.

• A. True
• B. False

Answer 1

The correct option is A

True

Consider a triangle ABC,

and Let A and C be a pair of angles for which they are complementary, which means $\angle A$ +$\angle C$ = ${90}^{\circ }$.
Thus $\angle B$ = ${90}^{\circ }$.
Hence, the triangle is right angled triangle.