Review the steps for finding the missing angle measure in a triangle, and then try to do a problem yourself.

Question

By the Triangle Angle-Sum Theorem, you know that the sum of the angle measures is 180°.

Solve for m∠1.
Giant Panda 1

Find
m∠1
.

A.
40°

B.
35°

C.
30°

D.
53°

Answer 1

To find the missing angle measure (m∠1), we can use the Triangle Angle-Sum Theorem which states that the sum of the angles in a triangle is 180°.

Let's assume the angles in the triangle are m∠1, 50°, and 80°.

Now we will sum up the angles:
m∠1 + 50° + 80° = 180°

Combining the angles:
m∠1 + 130° = 180°

Now, subtracting 130° from both sides to solve for m∠1:
m∠1 = 180° - 130°
m∠1 = 50°

Therefore, the missing angle measure (m∠1) is 50°. So the answer is not provided in the options, so please check the problem again.