Question

Please answer 7th question. It’s urgent

Answer 1

Answer: (c) 130°

Step-by-step explanation:

Let the third angle be x°.

In isosceles triangle, 2 angles are equal.

Given, equal angles = 25° each. Let each equal angle be y°.

=> x + y + y = 180°   (Angle Sum Property of Δ)

=> x + 2y = 180°

=> x + (2 × 25°) = 180°

=> x + 50° = 180°

=> x = 180° - 50°

=> x = 130°

Since 130° is greater than 25°, it is the greatest angle in the triangle.

Thus, you anser is (c).

Answer 2

The equal angles have a measure of 25°.

In a triangle, there are three angles.

In an isosceles triangle, two angles are equal while another one is unequal.

In a triangle, sum of all the three angles is 180°.

So,

Required angle

= 180° - ( Sum of two equal angles)

= 180° - (25 + 25)°

= 180° - 50°

= 130°

The correct option is (c) 130°