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Evgen [1.6K]
3 years ago
13

The second angle of a triangle is three times as large as the first. the third angle is 20 degrees less than the sum of the othe

r two angles. find the measure of the first angle.
Mathematics
1 answer:
timama [110]3 years ago
6 0
The first angle is 25 degrees
25+75=100
100-20=80
100+80=180
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