Question

the area of the right angle triangle is 54 cm square if its one leg is 12 cm long find its perimeter​

Answer 1

Step-by-step explanation:

Perimeter = 15+9+12 = 36 cm.

Answer 2

Answer: 36cm

Step-by-step explanation: We know that area of a triangle is 1/2*b*h.

In this case, we will take b as 12.

So, 54cm = 1/2*12*h

54cm = 6*h

Now, we take 54cm to the right side, that is,

h = 54/6 = 9.

Now, we have to take the Pythagoras property here, that is

a^2 + b^2 = c^2

12^2 + 9^2 = c^2, which is

144 + 81 = 225.

Now, we have to take the square root of 225, that is

15.

We now know all the 3 sides to find the perimeter.

That is,

12 + 9 + 15 =

36cm