Question

The perimeter of a triangle is 30cm. Its sides are in the ratio1:3:2,
then find its area.

Answer 1

Answer:

25cm

Step-by-step explanation:

1:2:3

5:10:15

breath times height divided by 2= A of a triangle

10 times 5 divided by 2= 25cm

Answer 2

Step-by-step explanation:

a+b+c=30

x+3x+2x=30 (1:3:2)

6x=30

x=5

a=x=5

b=3x=8

c=2x=7

s=(a+b+c)/2

s=(5+8+7)/2

s=10

Area=sqrt{s(s-a)(s-b)(s-c)}

Area=sqrt{10(10-5)(10-8)(10-7)}

Area=sqrt(10x5x2x3)

Area=sqrt(300)

Area=10\sqrt(3)