Answer:
The circumference is 194.78, but it's 194.8 when rounded to the nearest tenth.
The area is 3019.1.
Step-by-step explanation:
To find these values, all you have to do is use these formulas.
Area = πr2.
Circumference = 2πr.
Since you already know what r (radius, but it's marked as a on the drawing) is, you can simply plug r (31) into the formulas.
First let's do area.
Area = π(31)²
Do (31)² first before doing anything with π.
(31)² = 961
Now you have:
Area = π(961)
π · 961 = 3019.1
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Now for the circumference. Put 31 in place of "r".
C = 2π(31)
Do π(31)
π · 31 = 97.3893722613, but you can shorten that big number if you want, too.
Now you have:
C = 2(97.3893722613)
2 · 97.3893722613 = 194.8
