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3 years ago

URGENT!! Need help can someone explain please!!!

Mathematics

2 answers:

GenaCL600 [577]3 years ago

8 0

Answer:69 degrees

Step-by-step explanation: A triangle's angles all add up to 180 so if you think about it angle1 is the two given angles together.

forsale [732]3 years ago

5 0

Answer:

The answer to your question is 1 = 69°

Step-by-step explanation:

To solve this problem remember that the sum of the internal angles in a triangle equals 180°.

Let the third angle of the triangle be x.

39° + 30° + x = 180

Solve for x

x = 180 - 39 - 30

x = 111°

Angle x and angle 1 are supplementary so their sum equals 180°.

111° + 1 = 180

1 = 180 - 111

1 = 69°

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