Question

how to find the angle in triangle if A is 108 and B is 125 and C​

Answer 1

Always Remember:

Sum of all angles of a triangle is 180 degrees.

ANSWER:

In triangle,

Angle A = 108 degree

Angle B = 125 degree

Angle C = ?

Angle A + Angle B + Angle C = 180 degree

108 degree + 125 degree + Angle C = 180 degree

= 108 + 125 = 223 degree

Angle C = 180 - 223

But this is not a triangle bcoz it's sum makes 180 degree and here 223 is greater than that. Hence, this question is wrong.

Answer 2

The question is actually wrong because it didn't mention the angle properly. 125⁰ is exterior or interior angle?

If I take 125⁰ and 108⁰ as exterior angles;

angle ABC = 180 -125 [BC is a straight line]

= 55⁰

angle BAC = 180 -108 [AC is a straight line]

= 75⁰

According to angle sum property, sum of all angles of any triangle is 180⁰. So;

angle ABC + angle BAC + angle ACB = 180⁰

55 + 75 + angle ACB = 180⁰

130 + angle ACB = 180⁰

angle ACB = 180 -130

angle ACB = 50⁰