Question

is tangent to circle O at B. What is the length of the radius r? Round to the nearest tenth.

13.0
3.6
7.0
9.9

Answer 1

@jim_thompson5910

Answer 2

pythagorean theorem

a^2 + b^2 = c^2
r^2 + 5^2 = (8.6)^2

solve for r

Answer 3

would i subtracts first?

Answer 4

I recommend finding 5^2 and (8.6)^2 first

Answer 5

5^2+8.6^2= 98 24/25

Answer 6

what is 5^2 equal to

Answer 7

the answer is 7.0 i did out the math work

Answer 8

25

Answer 9

what is (8.6)^2 equal to

Answer 10

73.96

Answer 11

a^2 + b^2 = c^2
r^2 + 5^2 = (8.6)^2
r^2 + 25 = 73.96

Answer 12

first isolate r^2

to do this, subtract 25 from both sides

Answer 13

after that take the square root of both sides

Answer 14

subtract from 73.96 and 8.6?

Answer 15

no 73.96 - 25