Question

two sides of a triangle are 5 and 7cm longer than the third side. If the perimeter is 21 cm , find the length of its side

Answer 1

Let the length of the unknown side be x.

ATP:

x+5+x+7+x=21

3x+12=21

=3x=9

=x=9/3=3

Lengths are:-

x,x+5,x+7

=3,3+5,3+7

=3,8,10cm

Hope it helps mate.

Answer 2

Let the length of the unknown side be x.

Let the length of the unknown side be x.ATP:

Let the length of the unknown side be x.ATP:x+5+x+7+x=21

Let the length of the unknown side be x.ATP:x+5+x+7+x=213x+12=21

Let the length of the unknown side be x.ATP:x+5+x+7+x=213x+12=21=3x=9

Let the length of the unknown side be x.ATP:x+5+x+7+x=213x+12=21=3x=9=x=9/3=3

Let the length of the unknown side be x.ATP:x+5+x+7+x=213x+12=21=3x=9=x=9/3=3Lengths are:-

Let the length of the unknown side be x.ATP:x+5+x+7+x=213x+12=21=3x=9=x=9/3=3Lengths are:-x,x+5,x+7

Let the length of the unknown side be x.ATP:x+5+x+7+x=213x+12=21=3x=9=x=9/3=3Lengths are:-x,x+5,x+7=3,3+5,3+7

Let the length of the unknown side be x.ATP:x+5+x+7+x=213x+12=21=3x=9=x=9/3=3Lengths are:-x,x+5,x+7=3,3+5,3+7=3,8,10cm

Let the length of the unknown side be x.ATP:x+5+x+7+x=213x+12=21=3x=9=x=9/3=3Lengths are:-x,x+5,x+7=3,3+5,3+7=3,8,10cmHope it helps mate.