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1.3 Isosceles Triangles
Ready, Set, Go!
Name: ____________ Hr:__
Ready!
Refer to the Figure:
1. If AB  AD , name two congruent angles.
2.
3.
4.
5.
6.
If
If
If
If
If
GA  HA , name two congruent angles.
AF  AI , name two congruent angles.
ACD  ADC , name two congruent sides.
AHI  AIH , name two congruent sides.
DBA  BDA , name two congruent sides.
Set!
In exercises 7-9 solve for x:
7.
8.
9.
Go!
In exercises 10-19 solve for x:
10.
11.
12.
13.
14.
16.
15.
17. If triangle LMN is an isosceles
triangle and the measure of angle L
is 60 degrees, explain why all three
angles must be congruent.
18. If the measure of angle CDE is 28 degrees, find each of the remaining angles:
19. Solve for x (Remember what the sum of the three angles of a triangle is!)
(6x+2)°
(4x+5)°