Download 3.3 Isosceles and Equilateral Triangles 1. Name the base angles

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Geometry
3.3 Isosceles and Equilateral Triangles
Name:__________________________
1. Name the base angles and vertex angle for the given isosceles triangle ABC.
Base Angles: _______
_______
Vertex Angle: _______
For 2-4, find the value of x.
2.
3.
∠2
4
2
3
9 o and
5. In isosceles triangle ABC with base AC , ∠
Find the value of x and the measure of each angle in the triangle.
4.
∠2
∠
7
13
19 o.
6. If two angles of an isosceles triangle are each twice the measure of the third angle,
what is the measure of each angle?
3
7. Is isosceles triangle ABC also equilateral? Explain why or why not using complete
sentences.
Circle one: Equilateral
Not Equilateral
Justify your answer:
8. Is isosceles triangle ABC also equilateral? Explain why or why not using complete
sentences.
Circle one: Equilateral
Justify your answer:
9. Find the value of x
Not Equilateral
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