Envision Topic 12 Measurement

Danisha drew this rectangle with an area of 56 square feet. She labeled one side as 8 feet, but she forgot to label the other one. What should she label the unknown side?

• 6 feet

• 7 feet

• 8 feet

• 7 square feet

Find the area.

Which of these shows how to find the area of the blue shape?

• Multiply, 8 x 5 = 40. The blue area is 40 sq cm.

• Multiply, 8 x 5 = 40 for the entire space. Then, multiply 2 x 3 = 6 to find the white rectangle. Add the white area, 6 sq cm, to the entire outside space area of 40 sq cm. The answer is 46 square cm.

• Multiply, 8 x 5 = 40 for the entire space. Then, multiply 2 x 3 = 6 to find the white rectangle. Subtract the white area, 6 sq cm, from the entire outside space area of 40 sq cm. The answer is 34 square cm.

Look at this shape. Would you find the exact or estimated area?

• exact

• estimate

Kimmy says this shape has an area of 14 square feet. Do you agree? Explain.

• I agree because I counted 14 squares on the picture.

• I disagree because I counted 4 complete squares, so the area is 4. She also does not know the label is feet. It should be units.

• I disagree because I counted 4 complete middle sqaures, almost 4 complete squares in the second and fifth column, and 4 half squares in the first and sixth column. I put those together to make 2 squares. 4 + 4+ 2 = 10 square units. Square feet is also the incorrect label.

• I disagree becausre her area is 12 square units because there is a part of the red circle in 12 squares.

Tony has a square garden. One of the sides is 7 yards long. What is the area of his garden?

• 14 square yds

• 28 square yds

• 49 square yds

• I don't have enough information to find the area of this shape.

Tell the length of the missing side.

Then find the area.

• side = 10 cm, area = 70 square cm

• side = 5 cm, area = 70 square cm

• side = 15 cm, area = 50 square cm

• side = 10 cm, area = 50 square cm

Find the area.

• 24 square cm

• 28 square cm

• 32 square cm

• 36 square cm

Jeff made this tile pattern. The tiles are 1 square inch. What color covers the least area?

The length of a rectangle is 9 feet. Tell what the area would be if the width was: 8 feet? 6 feet? 2 feet?

• 72 sq. feet, 45 sq. feet, 19 sq. feet

• 72 sq. feet, 54 sq. feet, 18 sq. feet

• 63 sq, feet, 54 sq. feet, 18 sq. feet

• 72 sq. feet, 54 sq. feet, 16 sq. feet