The perimeter of a triangle is 25 feet. What is the length of the unknown side?

Perimeter of triangle=sum of all sides x= unknown sides

Step-by-step explanation:

25ft= x+ 5.2ft + 8ft

25ft= x + 13.2ft

subtract 13.2 from both sides

11.8 feet = x

unknown side is 11.8 feet

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

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