Circumference and Area of Circles

Front

What is the formula for the AREA of a circle?

Back

Tags

CCSS.7.G.B.4

Front

What is the formula for the CIRCUMFERENCE of a circle?

Back

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 7 cm, what is its area?

Back

@@A= ext{π} imes (7)^2 \\ A ext{ is approximately } 153.94 ext{ cm}^2.

Tags

CCSS.7.G.B.4

Front

If the diameter of a circle is 10 cm, what is its circumference?

Back

@@C= ext{π} imes 10 \\ C ext{ is approximately } 31.42 ext{ cm}.

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

Tags

CCSS.7.G.B.4

Front

How do you convert diameter to radius?

Back

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 5 cm?

Back

@@A= ext{π} imes (5)^2 \\ A ext{ is approximately } 78.54 ext{ cm}^2.

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a radius of 3 cm?

Back

@@C=2 ext{π} imes 3 \\ C ext{ is approximately } 18.85 ext{ cm}.

Tags

CCSS.7.G.B.4

Front

If the area of a circle is 50.27 cm², what is the radius?

Back

@@A= ext{π} imes r^2 \\ r=rac{A}{ ext{π}} \\ r ext{ is approximately } 4.01 ext{ cm}.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a diameter of 8 cm?

Back

@@A= ext{π} imes (4)^2 \\ A ext{ is approximately } 50.27 ext{ cm}^2.

Tags

CCSS.7.G.B.4