Question

7th grade math again ​

Answer 1

Answer: Hope this helps :))

Explanation:

Step 1: Find the circumfrence

Circumfrence= 2πr

R= 6.25

Plug into the formula:

2πr

2x6.25x3.14

= 39.25 , which rounds to 39.3, further rounds to 39.

Step 2: Find the diameter

Diameter: the length across the whole circle

Radius: length across 1/2 the circle. We know that the radius (r)= 6.25, so we must multiply this by 2 to find the total. Another way is to just do 6.25+6.25, since its 1/2 and 1/2.

6.25x2= 12.5

6.25+6.25= 12.5

Diametr= 12.5

Step 3: Write the ratio.

Circumfrence: diameter

39: 12.5

Answer 2

Answer: pi

Explanation:

Formula for circumference = 2 x pi x radius

Formula for diameter = 2 x radius

Plug in 6.25 for radius

Circumference = 2 x pi x 6.25

Diameter = 2 x 6.25

Find ratio by diving Circumference over Diameter:

(2 x pi x 6.25) / (2 x 6.25)

Simplify: answer is pi

could also be 3.14