Question

pythagoras theoram of 72=(x)2=(x)2

Answer 1

Answer:

Let the unknown side be y.

Applying Pythagoras theorem gives us

(5x)

2

=(4x)

2

+y

2

⇒25x

2

−16x

2

=y

2

⇒9x

2

=y

2

⇒y=3x

Therefore the perimeter of the triangle is 3x+5x+4x=12x=72

∴x=

12

72

=6