Question

In an isosceles triangle, the base angles are equal, the vertex angle is 50°. What are the base angles?

Answer 1

Answer:

•ABC is an isosceles triangle in which A is the vertex angle and B and C are the base angles.

•assume B and C as x

A+B+C = 180°

A+x+x=180°

50°+2x=180°

2x=( 180-50)°

2x= 130°

x= 130°÷2

= 65°

•Therefore, the measure of each base angle is 65°.

Answer 2

Answer:

Solution : Let the base angle of triangle = x°

According to question

x + x + 50°= 180°

2x = 180° - 50°

2x = 130°

X = 130°/2

X =65°

Hence the base angle = 65°