The perimeter of a triangle is 90 cm.
2 answers:
Can you work out what one share is
If you don’t know comment
Let's call one ratio = x
So, the sides are 3x, 5x and 7x respectively.
Since the perimeter is 90 cm, the sum of 3 sides = 90 cm
-> 3x + 5x + 7x = 90 cm
-> 15x = 90cm
-> x = 6cm.
So, the 3 sides are 3x6, 5x6 and 7x6 -> 18,30 and 42.
Recheck : 18 + 30 + 42 = 90
18:30:42 = 3:5:7 (all divided by 6)
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