Chapter 12 Flashcards
(22 cards)
Polygon
A closed figure made up of line segments that do not cross each other
Triangle
A polygon with three sides and three angles
Quadrilateral
A polygon that has four sides and four angles
Pentagon
A polygon with five sides
Hexagon
A polygon with six sides and six angles
Octagon
A polygon with eight sides
Congruent
Having the same measure
Acute triangle
A triangle with three acute angles
Obtuse triangle
An angle that measures between 90° and 190°
Right angle
An angle with a measure of 90°
Equilateral triangle
A triangle with three congruent sides
Scalene triangle
A triangle with no congruent sides
Isosceles triangle
A triangle with at least two sides of the same length
Trapezoid
A quadrilateral with exactly one pair of parallel sides
Parallelogram
A quadrilateral with four sides in which each pair of opposite sides are parallel and congruent
Rectangle
A quadrilateral with four right angles; opposite sides are equal and parallel
Rhombus
A parallelogram with four congruent sides
Square
A rectangle with four congruent sides
Base
(1) Any side of a parallelogram
(2) One of the two parallel congruent faces in a prism
Unit cube
A cube with a side length of one unit
Cubic unit
A unit for measuring volume such as cubic inch or a cubic centimeter.
Volume
The amount of space inside a three dimensional figure.
