Happy Tuesday

Take out your notes from Monday
Tonight's Homework:
 Study for test and prepare notes check
Agenda
1)
2)
3)
Review HW
4.8: Isosceles and Equilateral Triangles
Unit 2 Review
Review HW
While you are talking with your table about
the solutions, I will walk around and stamp
your study guide.
Review Study Guide #1-8
Think-Pair-Share
①
At your table discuss everything you know
about an isosceles triangle.
①
At your table discuss everything you know
about an equilateral triangle.
4-8 Isosceles and Equilateral
Triangles
Learning Objectives:
 SWBAT apply properties of isosceles and
equilateral triangles.
4-8 Isosceles and Equilateral Triangles
Sides of an Isosceles Triangle
Legs
 The congruent sides are the
legs.
Base
 The side opposite of the
vertex.
4-8 Isosceles and Equilateral Triangles
Angles of an Isosceles Triangle
Vertex Angle
 The angle formed by the legs.
Base Angles
 The two angles that have the
base as a side.
4-8 Isosceles and Equilateral Triangles
On your whiteboard, write down what you think the
converse will be.
4-8 Isosceles and Equilateral Triangles
Example 1
Example 1
Find the measure of the indicated angle.
What theorem or postulate did you use to find
the solution?
(a) mG
Example 1 (b)
Find the measure of the indicated angle.
What theorem or postulate did you use to find
the solution?
mF
Example 2
The length of YX is 20 feet.
Explain why the length of YZ is the
same.
Equilateral and Equiangular Triangles
In Sum…
 Equiangular
> Equilateral
Therefore
In any equilateral OR equiangular triangle,
each angle MUST equal…?
4-8 Isosceles and Equilateral Triangles
Example 3
Find the measure of the indicated value. What
corollary did you use?
(a) x
(b) OP
Whiteboards
1.
Find the <N. What theorem did you use to
come to your conclusions?
1.
Find the value of JL. Use 1-2 sentences to
explain how you found JL.
Whiteboard
Find the measure of x. Describe in 2-3
sentences on how you came to your solution.
Math Joke of the Day
1.
What did the frowning student say to his
teacher?
2.
I’ve got more problems than a math book
Unit 2 Review
Work on questions 6 and 7 on the study guide.
In 7 minutes, we will go over those answers.
Unit 2 Review
Work on question 10 on the study guide.
In 5 minutes, we will go over the answer.
Unit 2 Review
Work on questions 11 and 12 on the study
guide.
In 7 minutes, we will go over the answers.
Notecard Practice!
I am going to call out random vocab word.
I am going to use my equity sticks and you
are going to tell me what that word means!
Interactive Quiz
http://my.hrw.com/math06_07/nsmedia/pract
ice_tests/geo/geo_pt_trc.html