Question

the perimeter of right angle triangle is 6o CM and its hypotenuse is 25 centimetre find the area of triangle​

Answer 1

Answer:

perimeter of that triangle = 60 cm

the measure of hypotenuse = 25 cm

then the rest sides must measure = 60-25

= 35

let one side be x

then, the measure of the third side must be 35 - x

using pythagoras theorem

(25)^2 =(x)^2 + (35-x)^2

625 = x^2 + x^2 - 70x + 1225

x^2 + x^2 - 70x + 1225 = 625

x^2 + x^2 - 70x + 1225 -625 = 0

2 x^2 - 70x + 600 = 0

2x^2 - 40x - 30 x + 600= 0

2x (x-20) -30 ( x - 20) = 0

(x-20)(2x-30)=0

x -20 = 0

x = 20

2x -30 =0

2x =30

x = 15

so,

one of the side measure either 20 cm 15 cm

if one side measure 20cm then the other must measure 35 -20 = 15cm

and if it measured 15 cm then the other side measure 35-15 = 20 cm

so,

we will get 20 cm and 15 cm as our remaining sides.

one of then will be height and the other might  be the base,

now apply the formula of area of triangle i.e

(1/2) (height)(base)

= (1/2 )(20)(15)

= 150 cm^2

So, the area of that triangle will be 150cm^2

THANKS!