Q1 of 69 Page 10

In a Δ ABC, if ∠A = 55°, ∠B = 40°, find ∠C

Given, ∠A = 55^o

∠B = 40^o and ∠C =?

We know that, In sum of all angles of triangle is 180^o

∠A + ∠B + ∠C = 180^o

55^o + 40^o + ∠C = 180^o

95^o + ∠C = 180^o

∠C = 85^o

If the angles of a triangle are in the ratio 1 : 2 : 3, determine three angles.

The angles of a triangle are (x-40)°, (x-20)° and. Find the value of x.

The angles of a triangle are arranged ascending order of magnitude. If the difference between two consecutive angles is 10°, find the three angles.

Two angles of a triangle are equal and the third angle is greater than each of those angles by 30°. Determine all the angles of the triangle.