Answer: the sum of the three angles of a triangle equals 180 degrees
in a right triangle, one of the angles is 90 degrees
2.5x+3.5x+90=180
6x+90=180
6x=180-90
6x=90
x=90/6
x=15 answer
2.5x=2.5*15=37.5º
3.5x=3.5*15=52.5º
Step-by-step explanation:
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