Question

Solve the equation and choose the correct option;- In an isosceles triangle, the base angle are equal. the vertex angle is 40°. What are the base angle of the triangle? *
40°, 40°
40°, 70°
80°, 40°
70°, 70°​

Answer 1

Answer:

Let the base angles be ′x′

Therefore, 

x+x+40∘=180∘                                  [Given]

2x=180∘−40∘

2x=140∘

x=70∘

Hence, 

The base angles of the triangle are 70∘,70∘.

Step-by-step explanation:

hope this helps mark me as brilliant