Question

In a triangle one of the angle is 130degree, and the other two angle are equal. Find each of the equal angle?

Answer 1

We know that, sum of all three angles in a triangle is equal to 180°

Let the first angle and second angle which are equal be x

Given, one of the angle is 130°

According to the question,

x + x + 130 = 180

2x + 130 = 180

2x = 180 - 130

2x = 50

x = $\dfrac{50}{2}$

x = 25

$\therefore{}$ The two equal angles are 25° each.

Answer 2

given that
angle 1=130
and angle2= angle 3
sum of all angles of a triangle is 180
therefore
angle1+angle2+angle 3= 180
130+ angle 2+ angle 2= 180
2(angle2)=180-130
angle2= 50/2
angle2= 25
and angle 3= 25
hope it will help you..