Question

In a ∆ PQR, ∠QPR = 80o and PQ = PR. The value of ∠R is:​

Answer 1

Step-by-step explanation:

Let the measures of the unkown angles be 'x'

x + x + 80=180

2x+80=180

2x=180-80

2x=100

x=100÷2

x=50

Angle R =50