Question

If the sides of a triangle are 8 cm, 11 cm and 13 cm, then the area of triangle will be
(a) 12.
15 cm2
(b) 8/30 cm2
(C) 12 30 cm2
(d) 240 cm​

Answer 1

Answer:

8√30 cm²

Step-by-step explanation:

Let third side be x

Perimeter =8+11+x

19+x=32

x=13

S=

2

32

=16

Heron's formula

A=

√S(S−A)(S−B)(S−C)

=

√16(16−8)(16−11)(16−13)

=

√16×8×5×3

=8√30 cm²

Answer 2

Answer:

8√30 cm²

Step-by-step explanation:

Let third side be x

Perimeter =8+11+x

19+x=32

x=13

S=

2

32

=16

formula

A=

√S(S−A)(S−B)(S−C)

=

√16(16−8)(16−11)(16−13)

=

√16×8×5×3

=8√30 cm²

Hope it will help you!!!!!!