Question

Q
Find the third side of the triangle. If
the perimeter of that triangle 20m
and two of its side are 5m and 4m​

Answer 1

Step-by-step explanation:

let x be the third side

and the two sides be 5m nd 4m

Perimeter=20m

x+5m+4m=20

9m+x = 20m

x=20-9

x=11m

third side = 11m

Answer 2

Answer:

Step-by-step explanation:

Let the third side be x m

and the two sides be 5m and 4m.

perimeter=20m

perimeter=sum of all sides

20m=x+5+4

20-9=x

x=11m

So the third side is 11 m.