Today is the first block of the new semester! We will be testing Similarity and Dilation on January 22-23. There will be a 20 pt quiz on Tues-Wed, Jan 15-16.
Today we spent the first half of class working on using the concepts of ratio and proportion algebraically, verbally, and geometrically. The definition of similar polygons states that corresponding angles are congruent and corresponding sides are proportional, so we will need to be able to write and solve proportions easily in this unit. In the old textbook, we did pp 561-2:1-18. We also added definitions for ratio and proportion with examples to our Geometric Truth. If you were absent, get the definitions from a friend.
Students also got to see and check their finals, do a self-evaluation of the first semester, and receive a handout of suggestions for success in this class.
We made sure that we had two definitions in our GT: similar polygons (with good examples) and similar figures. See attachment below.
Then we used the definition to answer and explain why two polygons are similar or not. We also used the definition to write proportions to find missing sides of similar figures.
HW #1: pp 378-80: 1-19. You will need graph paper. Come by and get some if you did not take it with you.
Today we spent the first half of class working on using the concepts of ratio and proportion algebraically, verbally, and geometrically. The definition of similar polygons states that corresponding angles are congruent and corresponding sides are proportional, so we will need to be able to write and solve proportions easily in this unit. In the old textbook, we did pp 561-2:1-18. We also added definitions for ratio and proportion with examples to our Geometric Truth. If you were absent, get the definitions from a friend.
Students also got to see and check their finals, do a self-evaluation of the first semester, and receive a handout of suggestions for success in this class.
We made sure that we had two definitions in our GT: similar polygons (with good examples) and similar figures. See attachment below.
Then we used the definition to answer and explain why two polygons are similar or not. We also used the definition to write proportions to find missing sides of similar figures.
HW #1: pp 378-80: 1-19. You will need graph paper. Come by and get some if you did not take it with you.
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proportion_problems_in_class.pdf |