# McGraw Hill Math Grade 6 Lesson 18.4 Answer Key Perimeter

Practice questions available in McGraw Hill Math Grade 6 Answer Key PDF Lesson 18.4 Perimeter will engage students and is a great way of informal assessment.

## McGraw-Hill Math Grade 6 Answer Key Lesson 18.4 Perimeter

Exercises
SOLVE
Question 1.
What is the perimeter of a 2-inch square?
Perimeter of the square = 8 inches.

Explanation:
Side of square = 2 inches.
Perimeter of the square = 4 × Side of square
= 4 × 2 inches
= 8 inches.

Question 2.
A right triangle with sides measuring 3, 4, and 5 feet has what perimeter?
Perimeter of the right triangle = 12 feet.

Explanation:
Sides of the right triangle = 3, 4, and 5 feet
Perimeter of the right triangle = side of the right triangle + side of the right triangle + side of the right triangle
= 3 feet + 4 feet + 5 feet
= 7 feet + 5 feet
= 12 feet.

Question 3.
Which has a longer perimeter, a 7-foot square or a rectangle with sides of 5 feet and 8 feet?
A 7-foot square has a longer perimeter than a rectangle with sides of 5 feet and 8 feet.

Explanation:
Side of square = 7 foot.
Perimeter of square = 4 × Side of square
= 4 × 7 foot
= 28 foot.
Length of rectangle = 8 feet.
Width of rectangle = 5 feet.
Perimeter of rectangle = 2 (Length of rectangle + Width of rectangle)
= 2(8 feet + 5feet)
= 2 × 13 feet
= 26 feet.

Question 4.
A farmer is building a fence and wants to save fencing material. So he builds a rectangular fence with sides of 30 feet and 45 feet. One of the shorter sides of the fence will be the side of the barn. How many feet of fencing material will the farmer need?
150 feet of fencing material the farmer will need.

Explanation:
Length of the rectangular fence = 45 feet.
Width of the rectangular fence = 30 feet.
Perimeter of the rectangular fence = 2(Length of the rectangular fence + Width of the rectangular fence)
= 2 (45 feet + 30feet)
= 2 × 75 feet
= 150 feet.

Question 5.
Which has a longer perimeter, a 14-foot square or an equilateral triangle with sides of 10 feet?
14-foot square has a longer perimeter than an equilateral triangle with sides of 10 feet.

Explanation:
Side of the square = 14 foot.
Perimeter of the square = 4 × Side of the square
= 4 × 14 foot
= 56 foot.
Length of the equilateral triangle = 10 feet.
Perimeter of the equilateral triangle = 3 × Length of the equilateral triangle
= 3 × 10 feet
= 30 feet.

Question 6.
A triangle has one side of 5 inches and two sides of 7 inches. What is its perimeter?
Perimeter of the triangle = 19 inches.

Explanation:
Length of one side of triangle = 5 inches.
Length of other two sides of triangle = 7 inches.
Perimeter of the triangle = Length of one side of triangle + Length of other two sides of triangle
= 5 inches + 7 inches + 7 inches
= 12 inches + 7 inches
= 19 inches.

Question 7.
A triangle has 3 equal sides of 200 feet. What is its perimeter?
Perimeter of the triangle = 600 feet.

Explanation:
Length of 3 equal sides of triangle = 200 feet.
Perimeter of the triangle = 3 × Length of 3 equal sides of triangle
= 3 × 200 feet
= 600 feet.

Question 8.
A building has a rectangular base with sides of 200 feet and 450 feet. What is its perimeter?