Question

Geometry Help!

Answer 1

@Chris911

Answer 2

@satellite73

Answer 3

look up pythagorean theorem a squared plus b squared =c squared

Answer 4

But how would I make the 77 degrees a normal number?

Answer 5

@damian1 in this case pythagorean theorem cannot be used
SOH-CAH-TOA will be used

Answer 6

So you're given a side adjacent to angle B and trying to find the hypotenuse 'c'

Answer 7

its D 76.9 refer to this http://openstudy.com/study#/updates/52bdf5b7e4b04833919e780a

Answer 8

\[SOH=\frac{ opposite the \angle }{ hypotenuse }\]
\[CAH=\frac{ adjacent the \angle }{ hypotenuse }\]
\[TOA=\frac{ opposite the \angle }{ adjacent the \angle }\]

In this case you use CAH which is cosine or cos.

Answer 9

So we have
\[\cos (77)=\frac{ 17.3 }{ c }\]

Answer 10

its D

Answer 11

Thanks @Chris911 but @MrsDavidRandle where do we go from there?

Answer 12

I have a few similar problems so I just want to figure out how to get the answer... I appreciate the answer though. So thank you!

Answer 13

Well you want to get c by itself.

Answer 14

u take 17.3 divide it by the cos(77)

Answer 15

but that gives me .22

Answer 16

what would cos(77) be?

Answer 17

or how do we find the cos?

Answer 18

@satellite73

Answer 19

Okay that's what I got in the calculator.. then we divide?