Malorie's Blog

9-1 Right Triangles

In this section we learned about right angles and SOHCATOA. It was pretty easy because I remembered most of it from Geometry with Coach Joe.

In order to do this, you must know that follow formulas:

Sin Theta=Opp/Hyp Csc Theta=Hyp/Opp
Cos Theta=Adj/Hyp Sec Theta=Hyp/Adj
Tan Theta=Opp/Adj Cot Theta=Adj/Opp

(*Hint: this is only used with right angles and Hyp is opposite the 90 degree angle.)


Example:

In Triangle ABC, Angle A = 90 degrees, Angle B = 30 degrees, and a=15. Find b and c.

In order to figure out c, you must do cos b=c/15
c=12.99

In order to figure out b, you must use the pythagorean theorem.
b=7.5


So, now you know how to figure out the measurements of right triangles.