Pi: The Ultimate Ratio and That's a Spicy Pizza Review

(a)  

Answer explanation

Remember radii are line segments named by 2 end points

Name 3 radii for circle U

• RS, TS, TU

• US, UR, UT

• TU, US, RU

• STU, RSU, TUS

Tags

CCSS.HSG.CO.A.1

How are the radii of the two circles related?

Answer explanation

In congruent figures, everything is the same size. That means the radii are all the same length. Do you notice anything else?

Tags

CCSS.7.G.B.4

Compute the circumference of a circle with radius of 17 inches. (Use 3.14 for  $\pi$ and round to the hundreths place if needed)

(a)  

Answer explanation

 c =  $\pi$  * 2* r, so C = (3.14*2*17)

Tags

CCSS.7.G.B.4

Compute the diameter of a circle with circumference of 25 ft. (use 3.14 for Pi and round to the hundreths)

(a)  

Answer explanation

C = Pi * d, so 25 = 3.14 * d... (25/3.14) = d.

Tags

CCSS.7.G.B.4

Compute the area of a circle with radius equal to 4.5 inches.

• 63.56 in^2 (63.56 inches squared)

• 63.56 in

• 28.26 in

• 14.13 in^2 (14.13 inches squared)

Tags

CCSS.7.G.B.4

Compute the area of a circle with circumference of 175 feet. (use 3.14 for PI and round to the nearest whole number)

(a)  

Tags

CCSS.7.G.B.4

Compute the radius of a circle with circumference of 380 inches. (round to the nearest hundreth)

(a)  

Tags

CCSS.7.G.B.4

Marilynn wants to enclose her circular garden to keep the rabbit from eating her vegetables. The diameter of her garden is 14 feet. How much fencing will she have to buy if it is sold by the linear foot. (Use 3.14 for Pi)

(a)  

Tags

CCSS.7.G.B.4

Sonya wants to put a ribbon border around her round tablecloth. The diameter of the tablecloth is 38 inches. How much ribbon will she need to buy?

(a)  

Tags

CCSS.7.G.B.4