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3 years ago

If m∠A =91° and m∠B = 40°, find m∠1.

Mathematics

1 answer:

marusya05 [52]3 years ago

7 0

Answer:

m∠1 is calculated as 49°.

Step-by-step explanation:

Consider the angles are the interior angles of a triangle.

m∠A =91°

m∠B = 40°

m∠1 = ?

We know that the sum of interior angles of a triangle is 180°. So,

m∠A + m∠B + m∠1 = 180°

or, m∠1 = 180°- m∠A - m∠B

or, m∠1 = 180°- 91° - 40°

or, m∠1 = 49°

Hence, m∠1 = 49°.

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