Scribe Post, January 27

January 27 Scribe Post

Today we reviewed the midterm, and went over problems that a majority of the class and other classes had trouble with. One of these was about the equation, P = 3100ekt . We talked about how you can use algebra and graphs to find the solution, and how you can solve for k, or use algebra or graphing to find the coordinate you’re looking for.

We then took several surveys about the class, and discussed what we will be doing over third quarter. This will mostly include trigonometry, stuff like sin, cosine, and tangents, in shapes and as functions.

We talked about certain properties of triangles and circles:
- 45-45-90 triangles have sides that have a 1:1: the square root of 2 ratio
- 30-60-90 triangles have side ratios of 1:2: the square root of 3
- The largest angle is opposite the largest side, the smallest angle is opposite the smallest side, and the medium angle is opposite the medium side
- The Pythagorean Theorem is a2+ b2 = c2, where a, b, and c are the sides of a triangle, and c is the hypotenuse.
- To find the length of an arc, you do the angle of the arc over 360, multiplied by the circumference of the circle. For example:
- If you wanted to find the length of the large arc with the angle of 270º, you would do 270/360 X (2π•4). This would give the length of the large arc.

We then started the homework, which was a packet called Francois and his Pedometer. The homework is to finish the packet.

Next Scribe: Marnie :)

Hannah, Trigonometry, Scribe Post