Answer:
A Right triangle is 90 Degrees so that leaves 10 as the area of the side of the right line and the other side would be a Acute triangle that side would be 50 Degrees so that leaves 15 as the perimeter ok then you multiply 15 by 3 which is 45 and multiply 10 times 3 to get 30, 45 plus 30 is 75 so yes you are correct!!! :))))))))))
