Question

In Triangle ABC, if AB=AC and //A=80°, find C.​

Answer 1

Step-by-step explanation:

as it is a isosceles triangle angle abc=angle acb

so as we know sum of all angle of triangle is 180°

so consider angle b and c as x

$x + x + 80 = 180$

$2x + 80 = 180$

$2x = 180 - 80 \\ = 100$

$x = \frac{100}{2}$

$x = 50$

angle b = angle c = 50°