Question

HUOUVE
- Two sides of a triangle are 5 cm and 13 cm and its
perimeter is 30 cm. The area of the triangle in cm?
(A) 30
(C) 32.5
(B) 60
(D) 65​

Answer 1

Answer:

(A) 30

Step-by-step explanation:

Perimeter=30cm

Let the third side be x.

Sum or all three sides=perimeter

5+13+x=30

x=30-18

x=12

To prove that the triangle is a right angle triangle-

h^2=p^2+b^2

13^2=12^2+5^2

169=144+25

169=169

Proved.

Area if right angled triangle

=1/2×b×h

=1/2×5×12 (smallest side will be the base and longest will be hypotenuse so 12 will be height)

=5×6

=30

Answer 2

Answer:

A

Step-by-step explanation:

perimeter=30

let suppose the 3rd side is x

1st side=5

2nd side =13

3rd side=x

So,sum all side

5+13+x=30

5+x=30-13

5+x=17

x=17-5

x=12

answer=5+12+13=30