Math Flashcards
A segment is an____ if and only if it is perpendicular from a vertex of the triangle to the line that contains the opposite side.
altitude of a triangle
A segment is a ___of a triangle if and only if its endpoints are a vertex and the midpoint of the opposite side.
median
An ___ is a segment contained in the ray, which bisects the angle of the triangle, and whose endpoints are the vertex. angle and a point on the opposite side
angle bisector of a triangle
An ___is a triangle in which all angles are acute.
acute triangle
A____ is a triangle in which one of the angles is a right angle.
right triangle
An ____ is a triangle in which one of the angles is obtuse
obtuse triangle
An ___is a triangle in which all angles are congruent.
equiangular triangle
A is a triangle with no congruent sides.
scalene triangle
An is a triangle with at least two congruent sides.
isosceles triangle
An is a triangle with all sides congruent.
equilateral triangle
A polygon is ___if and only if at least one of its sides is contained in a line, which contains also points in the interior of the polygon..
nonconvex (concave)
A ___ is a polygon that is both equilateral and equiangular.
regular polygon
three sided polygon
triangle
are two lines that intersect to form a right angle.
Perpendicular lines
A ____is a closed figure such that the union of three or more coplanar segments, which intersect at endpoints, with each endpoint shared by exactly two noncollinear segment
polygon
A___ PR of a line segment XZ is a line segment perpendicular to XZ and passing through the midpoint.
perpendicular bisector
A polygon is ____if and only if the lines containing the sides of the polygon do not contain points in its its interior.
Convex
share a common vertex and a common side, but do not overlap,
Adjacent angles
Two angles are ___when the sum of their angles is 180°
supplementary
A___ is formed when two lines intersect. Two angles are said to be linear if they are adjacent angles formed by two intersecting lines and are supplementary
linear pair of angles
Opposite angles formed by two intersecting lines are ____
vertical angles.
___ is a part of a line that has one endpoint and goes an infinitely in one direction
Ray
An ___is the union of two noncollinear rays with a common endpoint.
angle
Two angles are ____ if and only if their measures are equal.
congruent
An _____is an angle with a measure greater than 0° but less than 90°.
acute angle
A____ is an angle with a measure of 90°
right angle
An ___ is an angle with a measure greater than 90° but less than 180°
obtuse angle
