Question

What is the measure of 12 years ago

Answer 1

@Mertsj

Answer 2

arc CD is 43
so angle COD = .. ?

Answer 3

it is also 43

Answer 4

You need to know 2 things to do this problem:
1. How many degrees in 1/2 circle
2. A central angle is equal to its arc

Answer 5

yes,
now COD and AOD are supplementary angles!

Answer 6

says the answer in the book is 137?

Answer 7

correct,
supplementary angles add up to 180 degrees,
or you can say angle in a semi-circle is 180

so, AOD+COD = 180
AOD + 43 = 180
AOD =..

Answer 8

oo ok i see it :)

Answer 9

cool :)