Question

perimeter of triangle is 30 cm if its sides are in ratio 3:5:7 find its area​

Answer 1

Answer:

Area of triangle is 25.98 square cm.

Step-by-step explanation:

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Answer 2

Answer:

15√3 sq cm...

Step-by-step explanation:

perimeter(p)=30 cm

let the sides be 3x ,5x,7x (because the ratio is given)

perimeter is sum of all sides

thus... 3x+5x+7x =30

15x=30

x=2

therefore the sides are as follows

a=3x=6

b=5x=10

c=7x=14

the area can be found using herons formula which will be as follows

s=a+b+c/2

s=15

area=√s(s-a) (s-b) (s-c)

=√15 *9*5*1

=√5 *3*3*3*5

=15√3 sq cm

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