Question

please answer the question guys fast

Answer 1

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3 . $\underline{Answer}$ : - $\boxed{ (C) \: 50°}$


$\underline{SOLUTION}$ ➡

We know that ,

In a isosceles triangle ,

The base angles are equal.

Let ,

Each of the base angle = x

•°• 80° + x + x = 180°

=> 2x = 180° - 80°

=> 2x = 100°

=> x = $\frac{100°}{2}$

=> x = 50°

So ,

Each of the base angles = 50°

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4. $\underline{Answer}$ : - $\boxed{ (A) 50° }$


$\underline{SOLUTION}$ ➡

We know that ,

In a isosceles triangle ,

The base angles are equal.

Let,

The angle of the vertex = x

•°• 65° + 65° + x = 180°

=> 130° + x = 180°

=> x = 180° - 130°

=> x = 50°

So ,

The angle of the vertex = 50°
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Answer 2

3) let the equal angles of the triangle be x
so now,
80 + x + x = 180
80 + 2x = 180
2x = 180 - 80
2x = 100
x = 50
therefore each base angle is of 50........

4) let the angle at vertex be x
Now,
65 + 65 + x = 180
130 + x = 180
x = 180 - 130
x = 50
Therefore, the vertex angle is of 50......

Hope the answeres r correct....................