Perimeter Calculation Mastery

This video tutorial by Mr. J focuses on a mastery check for calculating the perimeter of various shapes. It begins with instructions for solving four problems independently, including three geometric shapes and one word problem. The video then provides detailed solutions for each problem, emphasizing the importance of including all sides and units of measure. The tutorial covers calculating the perimeter of a triangle, rectangle, pentagon, and a rectangular backyard, reinforcing the concept that perimeter is the total distance around a shape.

What should you have ready before starting the perimeter mastery check?

• A textbook and notes

• A computer and internet connection

• A pen and paper

• A calculator and a ruler

Tags

CCSS.3.MD.D.8

How do you calculate the perimeter of a triangle with sides 8, 3, and 10?

• Subtract the smallest side from the largest

• Divide the sum of the sides by 3

• Add the sides together

• Multiply the sides together

Tags

CCSS.4.MD.A.3

What is the perimeter of a rectangle with sides 12 and 20?

• 40 inches

• 52 inches

• 64 inches

• 32 inches

Tags

CCSS.2.G.A.1

What is a five-sided polygon called?

• Pentagon

• Hexagon

• Octagon

• Quadrilateral

Tags

CCSS.3.MD.D.8

How do you find the perimeter of a pentagon with sides 4, 4, 3, 2, and 3?

• Multiply the longest side by 5

• Add all the sides together

• Add the two longest sides

• Subtract the smallest side from the largest

Tags

CCSS.4.MD.A.3

What is the perimeter of a rectangular backyard with a width of 30 yards and a length of 27 yards?

• 114 yards

• 87 yards

• 57 yards

• 60 yards

Tags

CCSS.4.MD.A.3

If a rectangle has a length of 27 yards, what is the total length of the two longer sides?

• 60 yards

• 27 yards

• 30 yards

• 54 yards

Tags

CCSS.4.MD.A.2

What is the first step in solving a word problem about perimeter?

• Draw a picture of the shape

• Guess the perimeter

• Multiply the sides

• Subtract the width from the length

Why is it important to include the unit of measure when calculating perimeter?

• It ensures the answer is complete

• It makes the calculation easier

• It is required for all math problems

• It helps in converting to other units

What is the perimeter of a shape?

• The area inside the shape

• The distance around the shape

• The diagonal of the shape

• The volume of the shape