Question

construct a triangle pqr, whose perimeter is 14 cm and whose sides are in the ratio 2:4:5.​

Answer 1

when we have value in ratio we will write like this 2x +4x+5x

perimeter of triangle is P=a+b+c

so,

14=2x+4x+5x

14=11x

14/11=x

x =1.27 (approx)

therefore,

2x=2*1.27=2.54(approx)

4x=4*1.27=5.08(approx)

5x=4*1.27=6.35(approx)