Calculating Areas of Irregular Shapes

What is the formula to find the area of a rectangle?

• Length - Width

• Length + Width

• Length x Width

• Length / Width

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the area of a rectangle with a length of 12 inches and width of 6 inches?

• 18 square inches

• 72 square inches

• 36 square inches

• 24 square inches

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the first step in finding the area of an irregular rectangle?

• Add all sides

• Divide the shape into two rectangles

• Multiply the longest sides

• Guess the area

Tags

CCSS.3.MD.C.7D

How do you find the area of each rectangle in an irregular shape?

• Length + Width

• Length / Width

• Guessing

• Length x Width

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the final step in finding the area of an irregular rectangle?

• Multiply the areas

• Divide the areas

• Subtract the areas

• Add the areas together

Tags

CCSS.3.MD.C.7D

How can you find the length of a missing side in a complex shape?

• Guess the length

• Add all known lengths

• Multiply all known lengths

• Subtract known length from total length

Tags

CCSS.3.MD.D.8

What do you do if a part of a shape is not a whole square?

• Ignore it

• Count it as a whole

• Combine it with another part

• Subtract it from the total

Tags

CCSS.3.MD.C.6