Circumference and Area of a Circle

A DVD has a diameter of 15 millimeters. Which equation would help you determine the circumference?

• c = 15π
• c = 2π15
• c = π(15²)
• c = π(7.5²)

Tags

CCSS.HSG.GMD.A.1

The diameter of Carol's old records from the 80s is 12 inches. Which equation would help you determine the area?

• A = 12π
• A = 2π12
• A = π(12²)
• A = π(6²)

What is the circumference? (Round to the nearest whole number.)

• 50
• 25
• 64
• 201

Enrique purchases an antique bowl for his mom for Mother's Day. The diameter of the bowl is 18 cm. What is the circumference of the bowl? (Round to the nearest whole number.)

• 28 cm
• 57 cm
• 254 cm
• 1017 cm

Tags

CCSS.7.G.B.4

Marisa purchases a pot for her father's garden. The diameter of the bottom of the pot is 18 cm. What is the area of the pot's bottom? (Round to the nearest whole number.)

• 28 cm²
• 57 cm²
• 254 cm²
• 1017 cm²

Tags

CCSS.7.G.B.4

Find the area of the circle below.

• 113.04 cm units²
• 18.84 cm units²
• 9 cm units²
• 28.26 cm units²

Tags

CCSS.HSG.GMD.A.1

Find the area of the circle.

• 21.98 units²
• 153.86 units²
• 43.96 units²
• 615.44 units²

a line that goes from one edge of the circle to another and crosses the center point

• center
• diameter
• dime eater
• radius

Tags

CCSS.HSG.C.A.2

a line from the center point to the edge of the circle

• diameter
• radio
• radius
• pi

Tags

CCSS.HSG.C.A.2

CCSS.HSG.CO.A.1

What is the area of a circle with a diameter of 10 cm ?

• 31.4 cm²
• 78.5 cm²
• 15.7 cm²
• 314 cm²

Tags

CCSS.7.G.B.4