the sides of a triangle are in the ratio 3:4:5 what is the length of each side if the perimeter of the triangle is 90cm
1 answer:
P of triangle = a + b = c = 90
<span>ratio 3:4:5
so a = 3x, b = 4x , c = 5x
3x + 4x + 5x = 90
12x = 90
x = 90/12 = 7.5
a = 3x = 3 * 7.5 = 22.5
b = 4x = 4 * 7.5 = 30
c = 5x = 5 * 7.5 = 37.5
Answer:
1st side = 22.5
2nd side = 30
3rd side = 37.5
Double check: 22.5 + 30 + 37.5 = 90 (perimeter)</span>
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