Block 25 was part of our area unit. Our big focus was to derive and apply the area formulas for triangle, trapezoid, kite, and regular polygon.
We began class with a warm-up to find partial area (shaded area) and to find area of a composite figure given vertices. A grade was taken over HW #1. We shared answers and strategies for HW #1 and the warm-up. Problem 9 from the homework was used as foreshadowing for how to find area of any triangle (every triangle is half of a parallelogram).
We then spent time creating notes on graph paper to give ourselves a visual demonstration of the formulas for triangle, trapezoid, kite, and regular polygon.
Everyone should have seen their test by now or taken it for make-up.
HW #2: pp 418-20: 1-11,13,16,17,19,20,23-25, p 427:1-2.
Please show your work! If solving for a dimension, write out the formula, substitute what you know, solve for what you don't know with algebra.
The quiz is Thurs-Fri, April 5-6, 40 pts.
Attached: the notes on the four formulas. Also look at the investigation on p 426.