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SCORPION-xisa [38]
3 years ago
9

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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3 years ago
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