Area and Perimeter Concepts

The video tutorial explains how to calculate the area and perimeter of a polygon. It begins with finding the area, dividing the polygon into a rectangular and a triangular part. The area of the rectangle is calculated using base times height, while the triangle's area is found using half the base times height. The tutorial then moves on to calculating the perimeter by summing the lengths of all sides. Finally, it discusses the importance of using correct units for area and perimeter, emphasizing the difference between square inches for area and inches for perimeter.

What is the first step in finding the area of a polygon?

• Measure the angles

• Calculate the perimeter

• Identify the shapes within the polygon

• Count the number of sides

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

How do you calculate the area of a rectangle?

• Base divided by height

• Base plus height

• Base times height

• Base minus height

Tags

CCSS.6.G.A.1

What is the formula for the area of a triangle?

• Base times height

• Base minus height

• Base plus height

• Base times height divided by 2

Tags

CCSS.6.G.A.1

Why is the area of a triangle half of the base times height?

• Because a triangle is smaller than a rectangle

• Because a triangle has three sides

• Because a triangle is half of a rectangle

• Because a triangle is a special shape

Tags

CCSS.6.G.A.1

What is the total area of the polygon in the example?

• 32 square inches

• 44 square inches

• 26 square inches

• 50 square inches

Tags

CCSS.3.MD.D.8

What is the perimeter of a shape?

• The total area of the shape

• The sum of all the sides of the shape

• The longest side of the shape

• The shortest side of the shape

Tags

CCSS.3.MD.D.8

How do you calculate the perimeter of a polygon?

• Subtract the lengths of all the sides

• Multiply the lengths of all the sides

• Divide the lengths of all the sides

• Add up the lengths of all the sides

Tags

CCSS.3.MD.D.8

What is the perimeter of the polygon in the example?

• 44 inches

• 50 inches

• 32 inches

• 26 inches

Why is the perimeter measured in one-dimensional units?

• Because it measures weight

• Because it measures area

• Because it measures length

• Because it measures volume

Tags

CCSS.3.MD.C.6

What units are used for area in the example?

• Feet

• Cubic inches

• Square inches

• Inches

Tags

CCSS.3.MD.C.6