Question

one of the angles of a triangle os 120 degree and other two angles are same , what is the measure of eash equal angle.​

Answer 1

Answer:

Let other angles be x

120+x+x=180

120+2x=180

2x=60

x=30

Therefore each angle is 30°

Answer 2

Answer:

30° and 30°

Step-by-step explanation:

Given that the one the angle of the triangle is 120° and other two are same.

Assume that the same angles is "a".

We know that,

Sum of all angles of triangle is 180°.

Means, /_a + /_a + 120° = 180°

→ 2/_a + 120° = 180°

→ 2/_a = 180° - 120°

→ 2/_a = 60°

→ /_a = 60°/2

→ /_a = 30°

Hence, the rest two angles of the traingle are 30° and 30°.

Verification:

Sum of all angles of triangle = 180°

30° + 30° + 120° = 180°

180° = 180°

LHS = RHS

Hence, proved.