Decomposing to Find Area

What is the area of the figure?

• 20 sq cm

• 4 sq cm

• 30 sq cm

• 24 sq cm

Tags

CCSS.3.MD.C.7D

What is the area of the figure?

• 80 cm²

• 16 cm²

• 96 cm²

• 32 cm²

Tags

CCSS.3.MD.C.7D

What is the area of the figure?

• 27 in²

• 36 in²

• 18 in²

• I have no idea

Tags

CCSS.3.MD.C.7D

What is the area of the figure?

• 14 units²

• 20 units²

• 24 units²

• 40 units²

Tags

CCSS.3.MD.C.7D

Calculate the area of this shape.

• 240 cm²

• 64 cm²

• 432 cm²

• 304 cm²

Tags

CCSS.3.MD.C.7D

Mary wants to hang 2 photos that are different sizes on her wall. She drew the model below to show how she will hang them.

• 3 + 5 = 8,

  2 + 3 = 5,

  8 + 5 = 13 square units

• 3 x 5 = 15

  2 x 3 = 6

  15 + 6 = 21 square units

• 3 x 2 = 6

  6 x 5 = 30

  30 - 3 = 27 square units

• 3 + 2 = 5

  5 + 3 = 8

  5 x 8 = 40 square units

Tags

CCSS.3.MD.C.7D

Find the area of the irregular figure.

• 200 in²

• 152 in²

• 48 in²

• 248 in²

Tags

CCSS.3.MD.C.7D

Priya decomposed a square into 16 smaller, equal-size squares and then cut out 4 of the small squares and attached them around the outside of original square to make a new figure.

How does the area of her new figure compare with that of the original square?

• The area of the new figure is greater.

• The area of the original square is greater.

• The two figures have the same area.

• We don’t know because neither the side length nor the area of the original square is known.

The area of this shape is 24 square units. Which of these statements is true about the area? Select all that apply.

• The area can be found by counting the number of squares that touch the edge of the shape.

• The area can be found by adding 4×3 and 6×2.

• The area can be found by multiplying the sides lengths that are 6 units and 4 units.

Which shape has a larger area: a rectangle that is 7 inches by 3 inch, or a square with side length of 5 inches?

• the rectangle

• the square

• The areas of the two shapes are equal.

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3