Week of January 18th

Algebra 2H pds 1,4
We learned that quadratic equations graph into parabolas. Today, we learned that the formula for finding the vertex is x = -b/2a. Then, substitute this answer into the original equation to find y. We also learned about the axis of symmetry.
HW Finish the worksheet started in today's class (# 1-6 only).
EC problem- Graph the parabola for the equation y = 2x^2 -4x - 1. Show all work.

Geometry H pds 2,5
We learned two other methods to prove triangles similar. They are the SAS Similarity and SSS Similarity Theorems.
HW Finish the worksheet started in today's class.
EC problem- Triangle ABC has AB= 12,AC= 9 and BC = 10.5. Triangle NXR has NX = 6, NR = 7, and XR - 8. Show that the two triangles are similar. Name the two triangles by matching corresponding angles. Remember to match little side to little side, middle to middle , and largest to largest.

Trigonometry pd 6
We learned the Double Angle Formulas today.
Sin 2A = 2sinAcosA
Cos 2A = cos^2 A - sin^2 A
Cos 2A = 2 cos^2 A - 1
Cos 2A = 1 - 2sin^2 A
HW Worksheet #1,2,3,5,6,7,9,13,17,23,25,29,31.
EC problems #10,41