The main purpose of expository text is to inform or describe what the story or book is about, so when the student reads they are understanding what is being read better. They can use this technique forever when reading and comprehening.
1. Short sound
2. Long sound
3. Long sound
4 short sound
5. Long sound
As per convention:
- the angle at A is named A, the angle at B is named B, and the angle at C is named C
- the side of leght a is the side opposed to A, the side of length b is opposed to B, and the side of length c is opposed to C.
Now just state the law of cosines:
c^2 = a^2 + b^2 - 2ab cos(C)
Also, a^2 = c^2 + b^2 - 2bc cos (A)
And, b^2 = a^2 + c^2 - 2ac cos (B)
