7th Grade Review Formulas/Circles

A circular swimming pool is 21 feet in diameter.
How many feet around is the pool?

• 10.5 ft
• 42 ft
• 65.94 ft
• 131.95 ft

Mrs. Wilson placed the welcome mat shown below on her front door step. What is the area of her welcome mat in square feet? Leave in terms of π.

• A = 2π
• A = 8π
• A = 10π
• A = 4π

Tags

CCSS.7.G.B.4

After taking part in a competition, Yahir received a bronze medal with a radius of 2.5 inches. What is the medal's diameter?

• 2.5 in
• 5 in
• 4 in
• 4.5 in

If the circumference of a circle is 600 mm, what is the diameter?

• 30 mm
• 95.54 mm
• 191.08 mm
• 360000 mm

Tags

CCSS.7.G.B.4

Area of a circle

• 𝝅r^2
• 𝝅 d
• 𝝅r2h
• 2𝝅r

Tags

CCSS.7.G.B.4

Circumference of a circle

• 𝝅r^2
• 2𝝅r
• 𝝅r
• 𝝅rd

Area of Triangle

• 1/2 (b1 +b2)h
• b*h
• 1/2 b * h
• l*w*h

Tags

CCSS.6.G.A.1

Area of a Trapezoid

• 1/2 b*h
• 1/3 b*h
• 1/2 (b1+b2)h
• 1/2 l*w*h

Area of parallelogram

• l*w*h
• 1/2 b*h
• b*h
• 1/3 b*h

Tags

CCSS.6.G.A.1

Percent of change formula

• Low-High
• Original - High = low
• Original - Low + High
• High - Low / original