Question

3 sides of a triangle are in the ratio of 3:5:7 and the perimeter of this triangle is 150cm find the area of triangle​

Answer 1

Step-by-step explanation:

a+b+c=perimeter

3x+5x+7x=180

15x=180

x=180/15

x=12

semi perimeter=3*12+5*12+7*12/2=75

area=√s(s-a)(s-b)(s-c)

√(75) (75-36) (75-60) (75-54)

√75*39*15*21

√5*5*3*3*13*3*5*3*7

5*3*3√13*5*7

45√455