Question

(b) In an isosceles triangle, the base angles are equal. The vertex angle is 40°
What are the base angles of the triangle? (Remember, the sum of three angles of
a triangle is 1809).​

Answer 1

Answer:

here's your answer in the attachment

Answer 2

Answer:

70⁰

Step-by-step explanation:

We have,

The vertex angle is 40⁰,

and, The base angles are equal

Let the base angle be, A

As we know,

Angle some property

for triangle is 180⁰

Now,

Sum of all angles in the given isosceles triangle is;

A + A + 40⁰ = 180⁰

2A + 40⁰ = 180⁰

2A = 180⁰ - 40⁰

2A = 140⁰

A = 70⁰

Hence, The base angle of the triangle is 70⁰

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