Circumference and area of circles

The radius of a circle is ​ (a)   the diameter.

• half
• twice
• triple

Tags

CCSS.7.G.B.4

Draw a circle with a diameter of 10cm.

Tags

CCSS.7.G.B.4

Match the formulas to the measurements indicated.

• To find the radius of the circle use:

• To find the diameter of a circle use:

• 2r

• To find the circumference of a circle use:

• d/2

• To find the area of a circle use:

Tags

CCSS.7.G.B.4

The diameter of this circle is ________.

Tags

CCSS.7.NS.A.2

The ratio between a circle's circumference and ​ (a)   is ​ (b)  

• diameter
• radius

What is the EXACT AREA of this circle? Give your answer in terms of pi.

Mathematical Equivalence

ON

Find the circumference of the circle whose radius is 4 in

• 12.56 in

• 25.12 in

• 50.24 in

Tags

CCSS.7.G.B.4

• 54

• 100

• 10

• 50

Find the circumference of the circle whose diameter is 10 m

• 31.4 m

• 62.8 m

• 15.7 m

Tags

CCSS.7.G.B.4