Question

2. Two angles of a triangle are 125° and 40°. Find the measure of the third angle.
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Answer 1

Answer:

Two angles of a triangle measure 12 and 40. What is the measure of the third triangle?

Answer

Measure of third angle be 128°

Given

Two angles are 12 and 40

To Calculate

Measure of third angle?

Explanation

Two angles are 12 and 40

Let third angle be x

☆ Sum of all angles of triangle = 180

➥ 12+40+x=180

➥ 52 +x=180

➥ x=180-52

➥ x= 128

Measure of third angle be 128°

Step-by-step explanation:

Answer 2

Answer:

15°

Step-by-step explanation:

In ΔABC sum of all angles is equal to 180°

so, ∠A=125°, ∠B=40°, ∠C=?

According to "Triangle sum property" sum of all angles is equal to 180°

So, ∠A+∠B+∠C = 180°

      125°+40°+∠C = 180°

        165°+∠C = 180°

           ∠C = 180°-165°

           ∠C = 15°

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