Understanding Area and Perimeter of Irregular Shapes

What is the first step in finding the perimeter of an irregular shape?

• Multiply the length by the width

• Subtract the smallest side from the largest

• Add up all the sides of the shape

• Divide the shape into smaller shapes

Tags

CCSS.3.MD.D.8

How many centimeters is the perimeter of the given irregular shape?

• 24 cm

• 36 cm

• 26 cm

• 30 cm

Tags

CCSS.3.MD.D.8

What is the first step in calculating the area of an irregular shape?

• Estimate the area visually

• Multiply the longest side by the shortest side

• Divide the shape into smaller, calculable shapes

• Add all the sides together

Why are the measurements of seven and two crossed out in the example?

• They are not needed for the perimeter calculation

• They are errors in the measurement

• They represent the shape's diagonals

• They do not apply to the rectangles formed

Tags

CCSS.6.G.A.4

What is the purpose of dividing an irregular shape into rectangles?

• To make it easier to visualize

• To simplify the calculation of the perimeter

• To simplify the calculation of the area

• To reduce the number of sides to calculate

What are the dimensions of the top rectangle used to calculate the area?

• Length 6 cm, Width 4 cm

• Length 4 cm, Width 3 cm

• Length 7 cm, Width 2 cm

• Length 5 cm, Width 4 cm

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the area of the bottom rectangle?

• 12 square centimeters

• 24 square centimeters

• 18 square centimeters

• 14 square centimeters

Tags

CCSS.6.G.A.1

How do you find the total area of the irregular shape?

• Multiply the areas of the smaller shapes

• Subtract the smaller area from the larger one

• Add the areas of the smaller shapes together

• Divide the larger area by the smaller one

Tags

CCSS.3.MD.C.7D

What is the total area of the irregular shape?

• 42 square centimeters

• 48 square centimeters

• 30 square centimeters

• 36 square centimeters

Tags

CCSS.6.G.A.1

If an irregular shape cannot be divided into two rectangles, what should you do?

• Estimate the area without calculations

• Ignore the irregular parts

• Only calculate the area of the largest part

• Divide it into more than two shapes if necessary