Question

4. If the vertex angle of an isosceles triangle is 90°, then find the base​

Answer 1

Now, we know that sum of the angles in a triangle is 180 degree

So,

→

2

x

+

x

+

x

=

180

∘

→

4

x

=

180

∘

→

x

=

180

4

⇒

x

=

45

∘

Now the other angle is

2

x

which is

45

×

2

=

90

∘

Hope this helps!!! ☺☻ have a good day...