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Concept
Isosceles Triangle Thm If… 2 legs congruent Then…2 base angles congruent Converse Isosceles Triangle Thm If…2 base angles congruent Then…2 legs congruent
Example 1a
A. ∠PJM ≅ ∠PMJ
B. ∠JMK ≅ ∠JKM
C. ∠KJP ≅ ∠JKP
D. ∠PML ≅ ∠PLK
A. Which statement correctly names two congruent angles?
Example 1b
B. Which statement correctly names two congruent segments?
A. JP ≅ PL
B. PM ≅ PJ
C. JK ≅ MK
D. PM ≅ PK
Example 2a
A. 30°
B. 45°
C. 60°
D. 65°
A. Find m∠T.
Concept
If Equilateral…Then Equiangular If Equilateral… Then All Angles 60 degrees
Example 3
A. x = 20, y = 8
B. x = 20, y = 7
C. x = 30, y = 8
D. x = 30, y = 7
Find the value of each variable.
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