What’s 1 and what’s 2 ?

For question 1:

The length of hypotenuse expression =√(8^2+9^2)

For question 2:

The expression for length a is

a=√(15^2-4^2)

Step-by-step explanation:

For question 1:

The length of hypotenuse expression =√(8^2+9^2)

For question 2:

Then expression for length a is

a=√(15^2-4^2)

29 mil

step-by-step explanation:

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.