Question

In a isosceles triangle,the vertex angle is twice either base . ( Let the base angle be b in degrees. Remember that the sum of angles of a triangle is 180 degree) .
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Answer 1

Step-by-step explanation:

Let, base angle be "b".

So, vertex angle= 2b

Sum of angles in a triangle= 180 degrees

There are 2 base angles and 1 vertex angle.

So,

2b+b+b = 180

4b= 180

b=180/4

b=45 degrees.

Therefore,

b=45 degrees

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Answer 2

Answer:

Let the base angle =b

⇒vertex angle =2b

Sum of angles in a triangle =180

°

⇒b+b+2b=180

⇒b=45

°

Angles =(45

°

,45

°

,90

°

)