• Shuffle
Toggle On
Toggle Off
• Alphabetize
Toggle On
Toggle Off
• Front First
Toggle On
Toggle Off
• Both Sides
Toggle On
Toggle Off
Toggle On
Toggle Off
Front

### How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

Play button

Play button

Progress

1/48

Click to flip

### 48 Cards in this Set

• Front
• Back
 point a position in space line an infinite continuous set of points extending in opposite directions forming a straight path plane a flat surface containing a set of points extending infinitely in all directions collinear points that lie on the same line coplanar points that lie on the same plane ray the part of a line that consists of a point, called an endpoint, and the set of points on one side of the endpoint line segment a part of a line that consist of two different points on the line, called endpoints, and the set of points on the line that is between them. it has a definite length postulate a statement that is assumed to be true without proof theorem a statement that can be proven by deductive reasoning congruent two figures that have the same size and shape angle the union of two rays that share a common endpoint vertex of an angle the intersection of two rays of an angle bisector a line, ray, or lene segment that divides an angle or line segment into two parts that have the same measure adjacent angles two coplanar angles that share a common vertex and a common side but have no interior points in common (do not overlap) supplementary angles two angles whose degree measures add up to 180 degrees complementary angles two angles whose degree measures add up to 90 degrees straight angle any angle whose degree measure is 180 degrees midpoint the point that divides a line segment into two congruent segments perpendicular lines two lines that intersect to form right angles perpendicular bisector a line that is perpendicular to a line segment intersecting the line segment at its midpoint polygon a closed figure formed by coplanar line segments that are joined at their midpoints. regular polygon a polygon whose sides and angles are all congruent triangle a polygon that has exactly three sides acute triangle a triangle whose angles are les than 90 degrees right triangle a triangle with one right angle and two acute angles hypotenuse the side of a triangle that is opposite the right angle leg the two sides of a right triangle that form the right angle, or the two congruent sides of an isosceles triangle obtuse triangle a triangle that has one angle that is greater than 90 degrees. equilateral triangle a triangle whose sides and angles are congruent isosceles triangle a triangle with two congruent sides base angles the angles in an isoscles triangle that are opposite the legs vertex angle the angle in an isosceles triangle that is formed by the two congruent sides. it is opposite the base scalene triangle a triangle with no congruent sides or angles altitude of a triangle the line segment drawn from the vertex of a triangle that is perpendicular to the opposite side median of a triangle the line segment drawn from a vertex of a triangle to the midpoint of the opposite side quadrilateral a four sided polygon parallelogram a quadrilateral whose opposite sides are parallel rectangle a parallelogram consisting of four right angles rhombus a parallelogram with four congruent sides square a parallelogram containing four congruent sides and four right angles trapezoid a quadrilateral with only one pair of parallel sides isosceles trapezoid a trapezoid whose nonparallel sides are congruent alternate interior angles a pair of angle with differnt vertices that lie between two lines and on opposite sides of a transversal transversal a line that intersects two other lines in two different points vertical angles the opposite pairs of congruent angles that are formed when two lines intersect corresponding angles a pair of angles consisting of one iterior angle and one exterior angle with different vertices on the same side of a transversal. alternate exterior angles a pair of angles with different vertices that lie outside two lines and on opposite sides os a transversal parallel lines lines that lie on the same plane and do not intersect