Question

http://locker.palcs.org/~adisciullo/Pictures/Ch5/Right%20triangles/45-45-90.jpg

Find the measure of CB if AB is 7 units.

Answer 1

you can solve it by cosign law
where
cos theta= adjacent over hypotenuse
ur theta is the angle
adjacent is ut AB=7
hypotenuse is the missing side
solution:
cos 45 dgr= 7 / CB
cross multply
CB cos45 = 7
divide all by cos45 to make CB alone
7 / cos 45 =7 squaroot of 2

Answer 2

Thanks! I got it :) can you answer another?