1. Exploring– Open your workbooks to P. EXPLORE!!!
10/27 WORKBOOK WARM UP
Exploring– Open your workbooks to P. EXPLORE!!!
Parts A – H

2. 7.2 ISOSCELES & EQULIATERAL TRIANGLE OBJECTIVE
I can verify theorems about the relationships in triangles, base angles of isosceles triangles and apply these relationships to solve problems. (G.6D)

3. ISOSCELES TRIANGLE DEFINTION
A triangle with at least 2 congruent sides
CHARACTERISTICS
1. The 2 legs are ≅
2.The 2 base ∠s are ≅
EXAMPLE
NONEXAMPLE
ISOSCELES TRIANGLE

4. Isosceles Triangle Theorem
If two sides of a triangle are congruent, then the two angles opposite the sides are congruent.
TAKE NOTES

5. ISOSCELES TRIANGLE THEOREM PROOF

6. STATEMENT REASON 1. BA ≅ CA 1. Given 2. ∠A ≅ ∠A 2. ___________________
3. CA ≅ BA
3. Symmetric Prop of Equal.
4. BAC ≅ CAB
4. ____________________
5. ____________
5. CPCTC
P. 369

7. Converse of Isosceles Triangle Theorem
If two _____ of a triangle are congruent, then the two ______ opposite those _____ are congruent.
TAKE NOTES

8. EQUILATERAL TRIANGLE All angles are ≅ DEFINTION
A triangle with 3 congruent sides & 3 congr. angles
CHARACTERISTICS
All sides are ≅
All angles are ≅
EXAMPLE 1
EXAMPLE 2
EQUILATERAL TRIANGLE

9. Equilateral Triangle Theorem
If a triangle is equilateral, then it is equiangular.
TAKE NOTES

10. Converse of Equilateral Triangle Theorem
If a triangle is _______, then it is _________.
TAKE NOTES

11. USING PROPERTIES OF ISOSCELES & EQUILATERAL TRIANGLES
Have students tear out
***check their boxes for orderly books before they leave

12. I DO, YOU WATCH
Katie is stitching the center inlay onto a banner that she created to represent her new tutorial service. It is an equilateral triangle with the following dimensions in centimeters. What is the length of each side of the triangle?
Have students complete in workbooks
P. 371

13. Determine the unknown angle. B) m<T
I DO, YOU HELP
Determine the unknown angle. B) m<T
Have students complete in workbooks
P. 354

14. P. 3725 #S 5 & 86 YOU DO, I HELP Have students complete in workbooks

15. HW#3: 7.2 P. 374-375 #S 5-11 ODD DUE TOMORROW
Have students tear out
***check their boxes for orderly books before they leave