Exploring Area and Perimeter of Irregular Shapes

This lesson covers how to find the area and perimeter of both regular and irregular shapes. It begins with an introduction to perimeter, explaining it as the distance around the outside of a shape, and provides practice examples. The lesson then moves on to irregular shapes, demonstrating how to calculate their perimeter. Next, it introduces the concept of area, defined as the space inside a shape, and explains how to calculate it for both regular and irregular shapes by splitting them into simpler parts. The lesson concludes with strategies for handling complex shapes.

What is the perimeter of a shape with sides of 7, 7, 4, and 4 units?

• 28 units

• 14 units

• 18 units

• 22 units

Tags

CCSS.3.MD.D.8

What is the perimeter of a shape with sides of 3, 8, 3, and 8 units?

• 22 units

• 24 units

• 20 units

• 26 units

Tags

CCSS.3.MD.D.8

What is the perimeter of a shape with sides measuring 2, 7, 2, and 7 units?

• 14 units

• 18 units

• 20 units

• 16 units

Tags

CCSS.3.MD.D.8

How do you calculate the perimeter of an irregular shape?

• Double the length and width

• Sum the longest and shortest side

• Multiply the length by width

• Add the length of all sides

Tags

CCSS.3.MD.D.8

What is the area of a rectangle with a length of 7 units and width of 4 units?

• 11 units

• 28 units

• 14 units

• 22 units

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

How do you calculate the area of a shape split into two rectangles, one with length 2 units and width 4 units, and the other with length 4 units and width 3 units?

• 32 units

• 28 units

• 24 units

• 20 units

Tags

CCSS.3.MD.C.7D

If a shape has a length of 10 units and a width of 3 units, what is its area?

• 26 units

• 40 units

• 13 units

• 30 units

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

For a square with each side measuring 6 units, what is the area?

• 36 units

• 24 units

• 12 units

• 18 units

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the perimeter of a shape with sides of 1, 6, 6, 2, 8, and 7 units?

• 32 units

• 30 units

• 24 units

• 28 units

Tags

CCSS.3.MD.D.8

How do you find the area of irregular shapes?

• Add the length of all outer sides

• Use the perimeter to calculate the area

• Multiply the longest side by the shortest side

• Split them into regular shapes and sum their areas