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Triangle Congruence Theorems, Two Column Proofs, SSS, SAS, ASA, AAS Postulates, Geometry  Problems

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(Side,side,side) Triangles that have all congruent sides.

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(Angle,side,angle) Triangles that are congruent if two pairs of corresponding angles and a pair of opposites sides are equal.

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(Side,angle,side) Two sides and the included angle of one triangle are congruent.

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(Angle,side,angle) Triangles that are congruent if any two angles and their sides are equal.

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The angle between the congruent sides of a triangle

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An equation that contains at least one variable.

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The angles opposite the congruent side in an isosceles

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The point where three altitudes of a triangle meet.

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Three or more lines meeting at one point.

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The highest point of triangle.

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The angle between a side of a triangle and the extended side.

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A line segment joining a vertex to the midpoint of the opposite side, bisecting it.

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A line segment through a vertex to the perpendicular base.

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The point where all three medians intersect.

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The point at which the perpendicular bisectors of the

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The segment connecting the midpoints of two sides of a triangle.