Calculate area, circumfrence, radius, diameter of a circle

What is the area of a circle with a radius of 3?

• 9π
• 5π
• 91π
• 34π

Tags

CCSS.HSG.GMD.A.1

What is a circle?

• A round 2D shape with no sides or corners
• A curved 3D object with a side and corner
• This is wasting time

Tags

CCSS.HSG.CO.A.1

What is the radius of a circle with a diameter of 67?

• 15
• 21.8
• 33.5

Tags

CCSS.7.G.B.4

Calculate the circumference when the diameter is 42.
π=3

• 5
• 3⅜
• 5.2
• 126

What is/are the formula(s) to find the area of a circle?

• πr²
• 2πr
• √π

Tags

CCSS.HSG.GMD.A.1

What is pi (π)?

• An irrational number
• A natural number
• An integer
• A whole number

Tags

CCSS.8.NS.A.1

Circles with exactly the same radius measures

• Similar Circles
• Concentric Circles
• Congruent Circles
• Semicircle

Tags

CCSS.8.G.A.2

Name the circle

• A
• B
• C
• D

Your school has a new running track. The interior will be planted with grass. To the nearest square meter, how much grass seed is needed to cover the interior of the track? Use 3 for л.

• 54
• 27
• 81
• 108

The figure shows the outline of a new pier that is going to be built at the ocean. What is the area of the pier? Use 3 for л.

• 216
• 54
• 78
• 240