Identity to remember .
☆ We know that angles of triangle opposite of its equal sides are also equal
Here the information that we know about the given triangle is
So the angles opposite to the equal sides will be equal .
→ So one of those equal angle is x so other will also be x .
☆ Interior angle sum property states that sum of interior angles of triangle will be 180°
→ 80° + x + x = 180°
→ 2x = 180°-80°
→ 2x = 100°
→ x = 100/2
→ x = 50° .
- So the value of x is 50°.
