Question

67. Two angles of a triangle are of measures 25° and 75º. Find the measure of the third angle.

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Answer 1

Step-by-step explanation:

Let the 3rd angle be "x"

than,

x + 25 + 75 = 180°

or, x = 180 - 100

: x = 80°

Answer 2

GIVEn

Two angles of a triangle are of measures 25° and 75º. Find the measure of the third angle.

SOLUTIOn

Note : The sum of three angle of a triangle is equal to 180°

Now, according to the question

**Let third angle be x**

→ 25° + 75° + x = 180

→ 100 + x = 180

→ x = 180 - 100

→ x = 80°

Hence, the measure of the third angle is 80°