Math Final

A triangle with three acute angles

A line drawn in a figure to aid in a proof

One of the two angles that have the base of the triangle as a side

The side opposite the vertex angle

Two polygons whose corresponding sides and angles are congruent.

A style of proof that uses coordinate geometry and algebra.

A theorem whose proof follows directly from another theorem

• Angles in the same position in two different polygons that have the same number of
• angles

Sides in the same position in two different polygons that have the same number of sides.

An abbreviation for "Corresponding Parts of Congruent Triangles are Congruent," which can be used as a justification in a proof after two triangles are proven congruent.

A triangle with three congruent angles.

A triangle with three congruent sides

The set of all points outside a polygon

The angle formed by one side of a polygon and the extension of an adjacent side.

The set of all points inside the figure

The angle formed by two sides of a polygon with a common vertex

The angle formed by two adjacent sides of a polygon.

The common side of two consecutive angles of a polygon.

A triangle with at least two congruent sides.

One of the two congruent sides of the isosceles triangle.

A triangle with one obtuse angle.

An interior angle of a polygon that is not adjacent to the exterior angle.

A triangle with one right angle.

A triangle with no congruent sides.

A property of triangles that states that if the side lengths of a triangle are fixed, the triangle can have only one shape.

The intersection of 2 sides of the triangle

A basic figure that is not defined in terms of other figures

Points that lie on the same line

A flat surface that has no thickness and extends forever