Find the area of the circle.
Use 3.14 for pi

A =530.66 cm^2

Step-by-step explanation:

To find the area of a circle we use the formula

A = pi r^2

The radius is 13 and pi is approximated by 3.14

A = 3.14 (13)^2

A =530.66 cm^2

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer