Question

The picture shows a portion of a river dam.
http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_0408_07/image0044e2d9b99.jpg
What is the height, in meters, of the river dam?
My multiple choice are
145 tan 65°
145 cos 65°
145 over Tan 65*
145 over Cos 65*
I am Horrible with sine,cos, and tan can someone please explain this

Answer 1

that url wont work as it is restricted

Answer 2

let me try something else

Answer 3

do you know what sides to use in the tangent of the angle labeled 65º?

Answer 4

does it show up now?

Answer 5

opposite and adjacent right?

Answer 6

just use

SOH CAH TOA

only instead of solving for the angle you are solving for the height

Answer 7

opposite over adjacent
so write down
tan(65)= opp/adj

Answer 8

tan(65) = 145/x
solve for x using basic algebra

Answer 9

and a calculator

Answer 10

then use algebra to rewrite so height = 145/tan(65)

Answer 11

OH ok I know how to do that I think

Answer 12

to remember what side is which, look at the angle, it will point at the opposite side, and will be touching the adjacent side. The little square box in the corner points to the hypotenuse

Answer 13

you are a life save I always confuse adjacent and hypotenus

Answer 14

I will definitely remember that thank you!