Question | Answer |
a line drawn in a figure to aid in a proof. | Auxiliary Line |
A triangle with three acute angles | Acute Triangle |
A triangle with three congruent acute angles | Equiangular Triangle |
A triangle with one right triangle | Right Triangle |
A triangle with one obtuse triangle | Obtuse Triangle |
A triangle with three congruent sides | Equilateral Triangle |
A triangle with at least two congruent sides | Isosceles Triangle |
A triangle with no congruent sides | Scalene Triangle |
A theorem whose proof follows directly form another theorem. | Corollary |
The set of all points inside a figure | Interior |
The set of all points outside a figure | Exterior |
An angle formed by two sides of a triangle | Interior Angle |
An angle formed by one side of the triangle and the extension of an adjacent side | Exterior Angle |
An interior angle that is not adjacent to the exterior angle | Remote interior angle |
Angels in the same position in two different polygons that have the same number of angles. | Corresponding angles of polygons |
Sides in the same position in two different polygons that have the same number of sides. | Corresponding sides of polygons |
Two polygons whose corresponding sides and angles are congruent. | Congruent polygons |
A property of triangles that states that if the side lengths of a triangle are fixed, the triangle can have only one shape. | Triangle rigidity |
An angle formed by two adjacent sides of a polygon. | Included angle |
The common side of two consecutive angles in a ploygon. | Included side |
CPCTC | Corresponding Parts of Congruent Triangles are Congruent. |
Congruent sides of an isosceles triangle | Legs |
The angle formed by the legs | Vertex angle |
The side opposite the vertex angle | Base |
The two angles that have the base as a side | Base angles |