Question

in the diagram below, AB and BC are tangent to O. what is the measure of ADC?

Answer 1

@jim_thompson5910 @Mertsj

Answer 2

let x = measure of arc ADC

using the same formula as last time, we can say

(x - 140)/2 = 40

solve for x

Answer 3

Okay! So I got 100, then divide by 2? @jim_thompson5910

Answer 4

I got 50 :)

Answer 5

(x - 140)/2 = 40

x - 140 = 40*2

x - 140 = 80

x = ???

Answer 6

30 :D @jim_thompson5910

Answer 7

something minus 140 equals 80

that something is what

Answer 8

60 I mean

Answer 9

@jim_thompson5910

Answer 10

x - 140 = 80

add 140 to both sides to solve for x

x = 80 + 140

x = ???

Answer 11

220? @jim_thompson5910

Answer 12

correct

Answer 13

THANK YOU JIM!!! :D

Answer 14

you're very welcome

hopefully this is all making sense

Answer 15

yes it definetly is! Sorry, I'm just really slow at math :( lol but last time I took the test last week that you helped me on, and I passed! So I know this is working out for sure :)

Answer 16

@jim_thompson5910