Geometry Date: 8/26/2011 Section 1.4 pg 29-33 Objective: SWBAT classify and measure angles. Bell Ringer: Quiz HW Requests: Pg 34 #34-50 evens; HW: pg 34.

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Presentation transcript:

Geometry Date: 8/26/2011 Section 1.4 pg Objective: SWBAT classify and measure angles. Bell Ringer: Quiz HW Requests: Pg 34 #34-50 evens; HW: pg 34 #35, 37, 39 pg 36 Practice Quiz #4, 5 pg Read Section 1.5 Pick up HW in Period one from 8/25 Announcements: Quiz Fri. Tutoring After School Mon. Ms. Harton Math Team meets on Tuesdays

Fundamental Definitions and Questions 1. What is an angle and what are its parts? Ray - Part of a line. It has one end point and goes on indefinitely in one direction. b. Opposite Rays – line – collinear rays form a line c.Angle – formed by 2 noncollinear rays with a common end point. The end point is called the vertex and the rays are called the sides. 2.How do we name angles? Vertex is always in the middle

Fundamental Definitions and Questions

3. What about interior and exterior points on an angle? Interior points lie inside the angle and exterior points are on the outside of the angle. 4. How do we measure angles? Use a protractor to measure in degrees. 5.How do we classify angles? 6.Exit Ticket: pg 33 #3-8; pg 26 #44

2. How do we find the segment measure on the number line? 3. How do we find the segment measure in a coordinate plane?

Congruent - Same shape, same measure What are the congruent segments? How do we know they are congruent? How do we show they are congruent?

Bell Ringer: Go over pg 9-10, spiral #30-44 (evens); Fundamental Questions: a. What is a line segment? b. How do we label a line segment? c.What are ways to measure a line segment? d. Why is it important to consider precision in measuring? e.How do we find measurements using colinearity and betweenness of points? f.What is congruence and how can we use congruence to find measurements? Read through Ex. 1, 2, 4. Examples- Guided practice 7-11

Get into groups of twoGroup it Up! Materials: 2 toothpicks, index card, pen or pencil, tape. Write header info on your index card. Include both names. Step 1: Mark 4 collinear points on one toothpick. Step 2. Tape this toothpick to the index card. On the index card, label the four points, A, B, C, D. Mark a noncollinear point P on the index card. Step 3. The toothpick represents a part of a line. On the index card, how do we show that the tooth pick is a line? How many points are on a line? Label the line as line m. Step 4. What is a name of the line? How many different names are there for this line? Step 5. The index card is the plane. Name and label a plane M on your index card. How many points are needed to make a plane? What kind of points must they be? Step 6. With your second toothpick? Mark two points on this toothpick. This toothpick is called line n. One point is point G and the other is point H. Step 7. Punch a hole in the index card with the toothpick so that the toothpicks intersect at point B and point G. When two lines intersect, what do they form? Is line n contained in plane M? Are point B and point H, collinear? Are point H and point D collinear? More questions? Are points A, B, H and P coplanar? Why must we look at four points?

Bell Ringer: Go over pg 9-10, spiral #30-44 (evens); Fundamental Questions: a. What is a line segment? b. How do we label a line segment? c.What are ways to measure a line segment? d. Why is it important to consider precision in measuring? e.How do we find measurements using collinearity and betweenness of points? f.What is congruence and how can we use congruence to find measurements? Read through Ex. 1, 2, 4. Examples- Guided practice 7-11