2. what is the radius of a circle if the length of a 45° arc is

11.46

Step-by-step explanation:

Formula for calculating the length of an arc is theta/360 ×2Πr. Where;

length of the arc (L) = 9

Theta= 45°

L = theta/360 × 2Πr

9 = 45/360× 2Πr

9 = 1/8 × 2Πr

9 = Πr/4

Πr = 36

r = 36/Π

r = 11.46

Substituting we have,

9 = r × 45°

r = 9/45

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!

no not all of them.

step-by-step explanation:

some of them have a square base.