Question

1) A square has a side length of 10 inches. What is the perimeter?

2) A Triangle has side lengths if 2x -7, 5x -3 and 2x -2. What is the perimeter of the triangle?

3) What is the perimeter of the triangle if x=6?

Answer 1

1) 40

2)9x-12

3)42

Explanation:

1) A square has 4 sides, and if one side's length is 10, the perimeter (distance around the square) is 10 times 4=40

2) Simply add these values together to get 9x-12

3) Plug in 6 as x in 9x-12. (6*9)-12=54-12=42

Answer 2

Explanation:

1) Perimeter of a plane shape is the distance round the shape. The formula for the perimeter of a square is expressed as

Perimeter = 4 × length of one side

Since the length of one side is given as 10 inches,

The perimeter = 4×10 = 40 inches.

2) the side lengths of the triangle are 2x -7, 5x -3 and 2x -2. The formula for the perimeter of a rectangle is expressed as

a + b + c

Where a,b and c are the length of the sides of the triangle.

Perimeter = 2x -7 + 5x -3 + 2x -2 = (9x -12) inches

3) if x=6, the perimeter of the triangle would be

9×6 -12 = 54 - 12 = 42 inches