3 years ago

19. The second angle of a triangle is twice the first. The third angle is 20 more than the first.

Mathematics

1 answer:

garik1379 [7]3 years ago

3 0

Answer:

2x+x+x+20=180

Step-by-step explanation:

Triangle Sum Theorem

first angle:x

Second: 2x

Third:x+20

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