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CPM Yr 1, Ch 4 Vocab

Chapter 4 - Mrs. Poppington Sees The World vocabulary

An angle with measure greater than 0 degrees and less than 90 degrees. acute angle
An angle that measures 90 degrees. right angle
An angle with measure greater than 90 degrees and less than 180 degrees. obtuse angle
The opposite angles where two lines meet. vertical angles
A triangle in which all three angle measures are less than 180 degrees. acute triangle
A triangle in which one angle is a right angle. right triangle
A triangle with an obtuse angle. obtuse triangle
A triangle with no equal side lengths. scalene triangle
A triangle with two or more sides of equal length. isoceles triangle
A triangle with all side lengths equal. equilateral triangle
A quadrilateral with one pair of parallel sides. trapezoid
A quadrilateral with both pairs of opposite sides parallel. parallelogram
A quadrilateral with four right angles. rectangle
A quadrilateral with all four sides of equal length. rhombus
A special rectangle with all sides of equal length. square
A two-dimensional closed figure of straight line segments connected end to end. polygon
A polygon in which all side lengths are equal and all angle measures are equal. regular polygon
A polygon with four sides. quadrilateral
A polygon with five sides. pentagon
A polygon with six sides. hexagon
A polygon with eight sides. octagon
The point where two consecutive sides of a polygon meet. vertex
A line segment that connects two vertices of a polygon and is not a side. diagonal
A set of points at a fixed distance (radius) from a point (center). circle
Two straight lines on a two-dimensional plane that do not intersect no matter how far they are extended. parallel lines
Two lines on flat surface which make a right angle when they meet. perpendicular lines
The part of a line between two points. line segment
Part of a line that starts at a point on the line and contains all the points on the line that are on one side of the starting point. ray
A special side of a polygon used to compute area. base
In a triangle, parallelogram, or trapezoid, the perpendicular distance from a vertex to the line containing the "opposite" side (possibly extended). height
Created by: CLHenry