Maths-

General

Easy

Question

Hint:

- the base angle theorem states that if the sides of a triangle are congruent then the angles opposite these sides are congruent.

## The correct answer is: straight angle A equals 70 to the power of ring operator

- We have been given a diagram of a triangle in the question named ABC we have also been given 𝑚∠𝐵 = 55°.
- We have to find out 𝑚∠A.

Step 1 of 1:

We have given figure

Here, AB = AC

It means the given triangle is an isosceles triangle.

Now,

By base angle theorem .

And it is given

So,

Step 2 of 2:

We know that the sum of angle of a triangle is 180^{0}

Here, AB = AC

It means the given triangle is an isosceles triangle.

Now,

By base angle theorem .

And it is given

So,

Step 2 of 2:

We know that the sum of angle of a triangle is 180

^{0}

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