Question

in an isosceles triangle if the base angle are equal to 45°, the vertex angle is​

Answer 1

Answer:

90°

Step-by-step explanation:

isosceles triangle means both the sides are equal then 45° = 45°

let the vertex angle =x

then, 45° + 45° + x = 180°

90° + x = 180°

x = 180°/90°

x = 90°

therefore, the vertex angle is 90°.