Question

2. Find the circumference. diameter of 42 a. Give an exact answer in terms of . (1 point) b. Use ≈ 22/7 , and express your answer as a fraction in lowest terms. (1 point)

Answer 1

Answer:

Part a) $C=42\pi\ units$

Part b) $C=\frac{132}{1}\ units$

Step-by-step explanation:

we know that

The circumference of a circle is equal to

$C=\pi D$

where

D is the diameter of circle

Part a) Find the circumference (exact value)

we have a diameter of

$D=42\ units$

substitute in the formula

$C=\pi (42)$

$C=42\pi\ units$ ----> exact value

Part b) Use pi≈22/7 , and express your answer as a fraction in lowest terms

we have

$\pi =\frac{22}{7}$

substitute

$C=42(\frac{22}{7})=6(22)=132\ units$

express as a fraction

$C=\frac{132}{1}\ units$