Brain Warm Up

What's area?

• the space INSIDE a shape

• the distance AROUND THE OUTSIDE of a shape

What's perimeter?

• the space INSIDE a shape

• the distance AROUND THE OUTSIDE of a shape

Which is a good formula for PERIMETER?

• P=b+b+h+h

• P=b+h

• P=b²+h²

• A=bh

Which is a good formula for AREA of a RECTANGLE?

• P=b+b+h+h

• A=s²

• A=b²+h²

• A=bh

Which is a good formula for AREA of a TRIANGLE?

• A=bh

• A=s²

• A=b²+h²

• A= (bh) ÷ 2

What is the perimeter?

• 20
• 40
• 60

Tags

CCSS.3.MD.D.8

Find the perimeter.

• Perimeter = 30 units
• Perimeter = 28 units
• Perimeter = 38 units
• Perimeter = 36 units

Tags

CCSS.3.MD.D.8

A book had a length of 5 inches and a width of 8 inches. What is the perimeter of the book?

• 26 inches
• 40 inches
• 36 inches
• 32 inches

Tags

CCSS.8.EE.C.7B

What is the perimeter?

• 4 in.
• 16 in. 
• 8 in. 

Tags

CCSS.4.MD.A.3

What is the area of this square?

• 169 ft²
• 209 ft²
• 196 ft²
• 260 ft²

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3