Question

A parallelogram has sides of length 7.7 millimeters and 17.2 millimeters. What is the perimeter?

Answer 1

P=2b+2c
P=2(7.7)+2(17.2)
P=15.2+34.4
P=49.6 millimeters

Answer 2

Solutions 

We know that a rectangle has four sides and the perimeter of a rectangle is the distance around the outside of the rectangle.The opposite sides of a rectangle are congruent To find the perimeter you have to use the formula 2 × (Side A + Side B). 

We have the side lengths 7.7 mm and 17.2 mm. 

Solve 

2 × (Side A + Side B) 
2 × ( Side A (7.7) + Side B (17.2) )  
= (7.7 x 2) + (17.2 x 2) 
= 49.6

The perimeter is 49.6 mm².