Question

Area of a right circular triangle is 54 cm2. If one of its legs is 12 cm long, its perimeter is
A)18cm B) 27 cm C) 36cm D) 54 cm
step by step explaination

Answer 1

We know

Area =

2

1

×length×height

=

2

1

×ab

P(perimeter)=a+b+

a

2

+b

2

P=a+

a

2

+4(A/a)

2

+2

a

A

=12+

(12)

2

+4(

12

54

)

2

+2

.

12

54

=36cm

Answer 2

Answer:

The area of the right angled triangle is 54 cm. If one of its legs is 12 cm long ,find its perimeter

Thus, c=15.

Now perimeter :-

P =a+b+c

=12+9+15

=36cm.