1.

The sides of a triangle are in the ratio 3:5:7 and its perimeter is 120cm.find its area​

Answer»

Answer:

perimeter = SUM of all 3 sides

= 3x + 5x + 7x

= 15x

so, 15x.= 120

x = 120 ÷ 15

= 8

so, 3x = 3×8 = 24cm

5x = 5×8 = 40cm

7x = 7×8 = 56cm

umm.. i don't know if it's a right.angled TRIANGLE or isosceles triangle, so I guess I'll have to find it URSELF, SORRY.



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