Flash Cards
decagon - polygon with 10 sides
corollary to base angles theorem - states that if a triangle is equilateral, then it is equiangular
converse to base angles theorem - states that if a triangle has two congruent angles, then the sides opposite them are congruent
n-gon - polygon with n sides
equiangular - a polygon where all angles are congruent'
vertices - the plural of vertex
polygon - a figure with at least three sides that are line segments and intersect exactly two other sides, one at each endpoint
base angles theorem - states that if two sides of a triangle are congruent, then the angles opposite them (called base angles) are congruent
edge - another term for the side of a polygon
right triangle - triangle with one right angle
triangle sum theorem - this theorem states that the sum of all three angles in a triangle is 180
scalene triangle - no congruent sides lengths
diagonal - a line segment that connects two vertices that are not the actual sides of a polygon
base angle - the angles of an isosceles angle opposite the legs
nonagon - polygon with 9 sides
exterior angle theorem - states that the measure of an exterior angle in a triangle is equal to the sum measures of the two non adjacent interior angles
concave polygon - a polygon where at least one diagonal is on the outside of the figure
quadrilateral - polygon with 4 sides
triangle - polygon with 3 sides
ASA Theorem - states that if two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the triangles are congruent
octagon - polygon with 8 sides
vertex - the endpoint of a line
convex polygon - a polygon where none of the diagonals in the polygon are on the outside of the figure
remote interior angles - non-adjacent interior angles to the exterior angle of a triangle
base - the non-congruent side of an isosceles triangle
SAS Congruence Postulate - states that if two sides and an included angle of one triangle are congruent to two sides and an included angle of a second triangle, then the triangles are congruent
obtuse triangle - triangle with one obtuse angle
heptagon - polygon with 7 sides
SSS Congruence Postulate - states that if three sides of one triangle are congruent to three sides of another, then the triangles are congruent
acute triangle - triangle with three acute angles
equilateral - a polygon where all sides are congruent
exterior angle - formed when a side of a triangle has been extended
converse to corollary to base angles theorem - states that if a triangle is equiangular, then it is equilateral
dodecagon - polygon with 12 sides
legs - the congruent sides of an isosceles
AAS Theorem - states that if two angles and a nonincluded side of one triangle is congruent to two angles and a nonincluded side of another triangle, thenthe triangles are congruent
isosceles triangle - triangle with at least two congruent side lengths
pentagon - polygon with 5 sides
hexagon - polygon with 6 sides
included angle - the angle that is formed by two sides of a triangle
regular - a polygon that has all congruent sides and congruent angles
equilateral triangle - triangle with three congruent side lengths
