Question

please answer this question​

Answer 1

Answer:

I which class you study

Answer 2

Answer:

Given that perimeter of triangle = 12cm

Length of hypotenuse = 5cm

Length of the base = 4cm

Length if the third side = perimeter - ( Sum of the lengths if the given 2 sides )

= 12-(5+4)=12-9= 3cm

Therefore length of the third side = 3cm

I am also suggesting an alternate method here to find the length of the third side , i.e. by Pythagoras theorem.

You can use this method when the perimeter of the triangle is not given ( only for a right triangle).

(Side 1 )^2 + ( Side 2)^2= Hypotenuse ^2

4^2+ (side 2 )^2 = 5 ^2

16 + (Side 2 )^2 = 25

(Side 2)^2=25-16

$side \: 2 = \sqrt{9}$

Therefore length of side 2 = 3cm

Now Area of the right triangle = 1/2*b*h

= 1/2 × 4 × 3 = 1/2 × 12 = 6cm^2

This is your Answer . Hope it helps. Please mark it as brainliest.