Question

The length of three sides of a triangle
are 20cm, 16cm, and 12cm. The area
(in cmn squared) of triangle is
O 96
0 120
O 144
0 160​

Answer 1

Answer:

Step-by-step explanation:

Area of triangle with sides a, b,and c and s =2a+b+c​ is s(s−a)(s−b)(s−c)

​ .

For triangle with sides 16 cm, 12 cm and 20 cm, s=216+12+20​=24cm

Area of the triangle with sides 16 cm, 12 cm and 20 cm =24(24−16)(24−12)(24−20)

​=24×8×12×4

​=8×3×8×4×3×4

​=8×3×4=96cm2

Area of triangle  can also be calculated using the formula 21​×base×height

Let the height for base 12cm, be h.

So, area =21​×12×h=96cm2

=>h=16cm

Answer 2

Since it is a right angled triangle
So area =1/2(16*12)9=96 cm^2