Area and Circumference

A line that goes from one end of the circle to the other and crosses the center point.

• center

• diameter

• chord

• radius

What is the formula for area of a circle?

• A = π × r²

• A = 2 × π × r

Tags

CCSS.7.G.B.4

Which formulas can be used to find Circumference?

• C = π×r²

• C = 2×π×r

• C = πd

Tags

CCSS.7.G.B.4

What is the radius of this circle?

• 18 in
• 10 in
• 9 in
• 8 in

Tags

CCSS.7.G.B.4

What is the diameter of this circle?

• 3.5 m
• 3 m
• 5 m
• 7 m

Tags

CCSS.7.G.B.4

What is the circumference of this circle ?

• 3.14 cm 
• 37.68 cm
• 24 cm
• 68.4 cm

Tags

CCSS.7.G.B.4

Find the area of the circle below.

• 100 cm²
• 225 cm²
• 9 cm²
• 28.26 cm²

Tags

CCSS.7.G.B.4

Refer to the figures shown below. Which figures have the same area? Select all that apply.

• 
• 
• 
• 

Tags

CCSS.7.G.B.4

A circle with a center at point O is shown. Determine which statement is FALSE.

• O̅M̅ is a radius of the circle.

• A̅B̅ is a diameter of the circle.

• To find the circumference, multiply the length line segment OB of by π

• None of the above

A window that is in the shape of a semicircle has a diameter of 28 inches. Find the area of the window. Round to the nearest tenth.

• 307.7 in²

• 615.44 in²

• 307.72 in²

• 307.70 in²

Tags

CCSS.7.G.B.4