Question

the vertex angle of an isosceles triangle is 100° . find its base​

Answer 1

Answer:

40°

Step-by-step explanation:

Since , it is an isosceles triangle so base angles are equal.

By Angle Sum Property of triangle , we get

Each Base Angle = 40°

Answer 2

Answer:

40

Step-by-step explanation:

base angle = ?

Now, vertex angle = 100

We know that, the two base angles are equal and sum of all three angles is 180

So, let the two angles be x

Then, x + x + 100 = 180

2x = 180 - 100

2x = 80

x = 80/2

x = 40