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Geometry 4.7 Done.notebook
October 27, 2015
GET 4.6 Homework out on your desk.
Oct 22­10:10 PM
ANNOUNCEMENTS
­Test Thurs, Review Tomorrow
­ Proof Options (due with review)
­ Chapter 4 Quizzes Oct 8­7:54 PM
1
Geometry 4.7 Done.notebook
October 27, 2015
4.7 Isosceles and Equilateral Triangles
Objective
iWBAT: apply the Base Angles Theorem and its Converse.
Oct 22­10:11 PM
Bell Work 4.7 Isosceles and Equilateral Triangles
1. One popular asterism is called the Summer Triangle composed of Deneb, Vega, and Altair. a. What is the value of y?
b. What is the measure of each angle in the Summer Triangle?
Oct 8­7:46 PM
2
Geometry 4.7 Done.notebook
October 27, 2015
Oct 8­8:17 PM
Exterior Angle Theorem
Oct 30­7:25 AM
3
Geometry 4.7 Done.notebook
October 27, 2015
Isosceles Triangles Vertex Angle
Leg
Leg
Base Angles
Base
Oct 8­8:21 PM
Base Angles (Isosceles) Theorem
If two sides of a triangle are congruent, then
the angles opposite the sides are congruent.
If
then
Oct 8­8:05 PM
4
Geometry 4.7 Done.notebook
October 27, 2015
Converse of the Base Angles (Isosceles)Theorem
If two angles of a triangle are congruent, then the
sides opposite those angles are congruent.
If
then
Oct 30­7:31 AM
Equilateral/Equiangular Triangles
If
then
.
If
then
.
Oct 8­8:05 PM
5
Geometry 4.7 Done.notebook
October 27, 2015
Example 1:
Find the measure of
each base angle.
Oct 8­8:22 PM
Example 2:
Find
Oct 8­8:22 PM
6
Geometry 4.7 Done.notebook
October 27, 2015
Example 3: Find the value of x and y.
Oct 27­7:40 AM
Example 4:
Find the value of x.
Oct 8­8:23 PM
7
Geometry 4.7 Done.notebook
October 27, 2015
Example 5:
Find the value of t.
Oct 27­7:40 AM
:)
:|
:(
Oct 30­7:43 AM
8
Geometry 4.7 Done.notebook
October 27, 2015
If AE = DE, then ___ = ___.
If AB = EB, then ___ = ___.
If
D=
CED, then ___ = ___.
If
EBC = ECB, then ___ =___.
Oct 8­8:25 PM
Assignment
4.7 WB #1-10
Tear out page 79
Oct 8­8:27 PM
9
Geometry 4.7 Done.notebook
October 27, 2015
Homework Help
Oct 28­3:17 PM
Oct 29­10:15 AM
10
Geometry 4.7 Done.notebook
October 27, 2015
Oct 30­7:54 AM
11
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