Question

Two angles of a triangle are 70° and 30° .The third angle of the triangle is................. ​

Answer 1

Step-by-step explanation:

Sum of all angles=180

70+30+ ×=180

×=180-100

×=80

Answer 2

The third angle of the triangle is 80°.

Given: Two angles of a triangle are 70° and 30° .

To Find: The third angle of the triangle.

Solution:

• We know that total angles in a triangle is 180°.

Using this point, we shall frame the equation of our question.

Let the third angle be ' x° '.

     70° + 30° + x° = 180°

⇒  x = 180° - 100°

⇒  x = 80°

Hence, the third angle of the triangle is 80°.

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