Upload
nikki
View
26
Download
0
Embed Size (px)
DESCRIPTION
Session 3 Daily Check. Name the type of angles. (1 point each) a) b). 1. 2. 1. 2. Solve for x. (4 points each) a) b) and are complementary. 4x+22. 10x-10. Homework Review. CCGPS Analytic Geometry Day 3 (8-9-13). - PowerPoint PPT Presentation
Citation preview
Session 3Session 3 Daily CheckDaily Check1. Name the type of angles. (1 point each)a) b)
1 221
2. Solve for x. (4 points each)a)
b) and are complementary.
10x-104x+22
BA7 1A x 4 1B x
CCGPS Analytic GeometryDay 3 (8-9-13)
UNIT QUESTION: How do I prove geometric theorems involving lines, angles, triangles and parallelograms?Standards: MCC9-12.G.SRT.1-5, MCC9-12.A.CO.6-13
Today’s Question:Which angles are congruent to each other when parallel lines are cut by a transversal?Standard: MCC9-12.A.CO.9
Parallel Lines – Two lines are parallel if and only if they are in the same plane and do not intersect.
AB
CD
AB CD
Ex 1Ex 1: Name all the parts of the prism shown : Name all the parts of the prism shown below. Assume segments that look parallel are below. Assume segments that look parallel are parallel.parallel.
A
B C
D
EF
G
1. A plane parallel to plane AFE. Plane BGD
2. All segments that intersect GB. AB, FG, DG, BC
3. All segments parallel to FE. GD, BC
4. All segments skew to ED. BG, FA, BC
Transversal – A line, line segment, or ray that intersects two or more lines at different points.
a
b
t Line t is a transversal.
Special AnglesSpecial Angles
123
4
567 8
Interior Angles – lie between the two lines (3, 4, 5, and 6)
Alternate Interior Angles – are on opposite sides of the transversal. (3 & 6 AND 4 and 5)
Consecutive Interior Angles – are on the same side of the transversal. (3 & 5 AND 4 & 6)
65
43
More Special AnglesMore Special Angles
21
7 8
Exterior Angles – lie outside the two lines (1, 2, 7, and 8)
Alternate Exterior Angles – are on opposite sides of the transversal (1& 8 AND 2 & 7)
65
43
Even More Special AnglesEven More Special Angles
21
7 8
Corresponding Angles – pair of angles which lie on the same side of the transversal and on same relative position of the parallels (both above or both below the parallel).
(2&6, 4&8
1&5 and 3&7)
Ex. 2Ex. 2: Identify each pair of angles as alternate : Identify each pair of angles as alternate interior, alternate exterior, consecutive interior, alternate exterior, consecutive interior, or vertical.interior, or vertical.
1
2
34
5
67
8
a. 1 and 2
b. 6 and 7
c. 3 and 4
d. 3 and 8
Alt. Ext. Angles
Vertical Angles
Alt. Int. Angles
Consec. Int. Anglese. 1 and 4
Corresponding Angles
Alternate Interior Angles Alternate Interior Angles TheoremTheorem
If two parallel lines are cut by a transversal, then each pair of alternate interior angles are congruent.
21
34 56
78
2 6
3 7
Alternate Exterior Angles Alternate Exterior Angles TheoremTheorem
If two parallel lines are cut by a transversal, then each pair of alternate exterior angles are congruent.
21
34 56
78
1 5
4 8
Consecutive Interior Angles Consecutive Interior Angles TheoremTheorem
If two parallel lines are cut by a transversal, then each pair of consecutive interior angles are supplementary.
21
34 56
78
m2 + m3 = 180°
m6 + m7 = 180°
Ex. 3Ex. 3 In the figure, p In the figure, pq. If mq. If m5 = 28°, find 5 = 28°, find the measure of each angle.the measure of each angle.
213 4
5 67 8
a. m8 =
b. m1 =
c. m2 =
d. m3 =
e. m4 =
28°
28°
152°
152°
28°
pq
Ex. 4Ex. 4 In the figure, s In the figure, st. Find the t. Find the mmCBG.CBG.
S
t
3x -5
4x -29
A
B
CD
E
F
G3x – 5 = 4x - 29-5 = x - 2924 = x
Step 1: Solve for x.
Step 2: mCBG = mABE = 3x -5.3x-5 = 3(24) – 5 = 72-5 = 67°
Ex: 5Ex: 5 Identify each pair of angles as: Identify each pair of angles as: alt. alt. interior, alt. exterior, consecutive interior, alt. exterior, consecutive interior, or vertical.interior, or vertical.
116
215
1110
129
138
67
314
45
10 and 6
Ex: 6Ex: 6 Identify each pair of angles as: Identify each pair of angles as: alt. alt. interior, alt. exterior, consecutive interior, alt. exterior, consecutive interior, or vertical.interior, or vertical.
116
215
1110
129
138
67
314
45
13 and 14
Ex: 7Ex: 7 Identify each pair of angles as: Identify each pair of angles as: alt. alt. interior, alt. exterior, consecutive interior, alt. exterior, consecutive interior, or vertical.interior, or vertical.
116
215
1110
129
138
67
314
45
6 and 14
Ex: 8Ex: 8 Identify each pair of angles as: Identify each pair of angles as: alt. alt. interior, alt. exterior, consecutive interior, alt. exterior, consecutive interior, or vertical.interior, or vertical.
116
215
1110
129
138
67
314
45
5 and 1
Ex: 9Ex: 9 Identify each pair of angles as: Identify each pair of angles as: alt. alt. interior, alt. exterior, consecutive interior, alt. exterior, consecutive interior, or vertical.interior, or vertical.
116
215
1110
129
138
67
314
45
15 and 12