Question

10) The lengths of 3 sides of a
triangle are 20 cm , 16 cm and
12 cm. The area of the triangle
is - *​

Answer 1

Step-by-step explanation:

area of a triangle is =side ×side

(20+16+12)

48

Answer 2

Step-by-step explanation:

sides = 20cm, 16cm , 12cm

Now by herons formula we can find the area

let

a =20cm

b=16cm

c=12cm

s =a+b+c

2

s =20+ 16+ 12

2

s = 24cm

area = √s(s-a) (s-b) (s-c)

= √24 (24-20) (24-16) (24-12)

= √24 × 4 × 8 × 12

= √24 × 4 × 4 × 2 × 12

= √24 × 4 × 4 × 24

= 24 × 4

= 96 cm²