Test Thurs-Fri, Oct 18-19, topics attached, 70 pts.
Each class on A day had a slightly different class period due to testing on Wednesday.
Here are the basics of what we accomplished in each class:
Each class on A day had a slightly different class period due to testing on Wednesday.
Here are the basics of what we accomplished in each class:
- Except for 6th period, a grade was taken over either HW #15 or #16.
- 1st and 2nd worked on the investigation 3.7 in class. 1st period took the quiz; 2nd period finished the quiz. Investigation 3.7 is attached to Block 21 Post.
- Classes that had not already done so did the Angle Bisector Investigation (p 165) as a class on square patty paper, leading to C-8: If a point is on the angle bisector it is equidistant from the sides of the angle. (This made a circle on the patty paper). The patty paper could be glued into GT if wanted.
- All classes went over assigned HW and asked questions or used keys to check answers.
- The Geogebra demonstration of the circumscribed and inscribed circles and why they work were shown on the screen, leading to C-12 and C-13. That page is attached to an extra post (next if you scroll down). The circumcenter is equidistant from the vertices of a triangle; the incenter is equidistant from the sides of a triangle. We will be able to explain why this follows from C-5 and C-8, respectively.
- Some classes did the centroid investigation on card stock; others did not. That will be completed in 1st and 2nd period on Tuesday.
- The centroid investigation is attached below. The conjectures 14-16 are on pp 190-192 in the new book. On #14 - the medians are concurrent at the centroid. On #15 the FITB is "Twice"; on #16, the FITB is "centroid". We will learn the cheer on Tues-Wed to associate the correct words with the correct construction.
- HW #16 or #17 depended on the class. 1st and 2nd period - finish investigation 3.7 (attached on Block 21) and writing up definitions of "Concurrent lines", "circumscribed circle", and C9-11 from the investigation. HW 16- p 167:11,13,17, p 171:3, p 175:1-3, p 187:1-3,5-6. HW #17 for 4th, 0b and 8th: p 168:15-16, p 173:17, p 176:6, p 187: 1-6,15. For 1-4 on p 187, just say which pt of concurrency with a sketch to explain.
- Test topics for Thurs-Fri, Oct 18-19, were passed out in most classes.
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