Question

9. If one angle of a triangle is equal to the sum of the other two, show that the triangle is
right-angled.
Hint. ZA= ZB+ ZC
ZA+ZAN ZA+ ZB+ ZC =180°​

Answer 1

Answer:

See the attachment and mark me as brilliant

Answer 2

Answer:

Step-by-step explanation:

Let the angles of triangle be A , B and C.

A + B + C = 180 --------------(1)

and A = B + C ----------(2)

Substitute (2) in (1)

A + A = 180

2A = 180

A = 90.

Hence triangle is right angled.