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# HCPSS Gr5Q3 Geometry

### Geometry Vocabulary for 5th Graders

What is a two-dimensional object that can be folded to make a three-dimensional object? net
Figures with the same size and shape or line segments that are the same length are _________. congruent
When you turn a figure around a point, you are doing a _______ . rotation roTation (T for turn)
Two lines that intersect at right angles are called _______. perpendicular
A three-dimensional figure is called a _____. solid figure
When you slide a figure from one place to another, you are doing a ______. translation tranSLation (SL for slide)
The face of a solid figure by which the figure is measured or named is called the _______. base
Figures that have the same shape but different sizes are called _______. similar
When two or more lines cross or meet at exactly one point they are called ______. intersecting lines
Lines that are always the same distance apart and will never cross or touch are called _________. parallel (The double letters in the middle remind us of the meaning of the word!)
A figure that can be measured in only two directions (length and width) is called a _______. two-dimensional figure
A figure that can be measured in three directions (length, width, and height) is called a _____. three-dimensional figure
When you make a mirror image of a figure by flipping it over, you are making a _________. reflection reFLection (FL for flip)
A tool used for drawing and measuring angles is called a ________. protractor
Angles that measure less than 90 degrees are called _____. acute angles
Angles that measure greater than 90 degrees are called ______. obtuse angles
Angles that measure exactly 90 degrees are called _____. right angles
In geometry, what is the name of a location on a line, line segment, ray or plane (usually drawn as a dot)? point
A _____ extends out in two directions and can go on forever. We always name two points somewhere on a ______. line
A ___________ is a piece a line that has two endpoints. We name a _______ by its endpoints. line segment
A _______ has one endpoint and extends in one direction forever. We always name the endpoint first and then one more point on a _____. ray
A three-sided figure whose sides and angles are all equal is called a ______. equilateral triangle
A three-sided figure that has two sides that are equal to each other and one side that is a different length is called a ______. isosceles triangle
A three-sided figure with no equal sides (all three sides are different lengths) is called a ______. scalene triangle
a three-sided figure in which one of its angles is a right angle (90 degrees)is called a _________. right triangle
Where two sides of a solid figure meet is called the ______. edge
Where three sides of a solid figure meet is called a _______. vertex (plural is vertices)
The flat sides of a geometric solid are called ______. faces
A two-dimensional (flat) figure that goes on in two directions forever is called a ________. plane
A plane (flat) figure with three or more straight sides is called a _____. polygon
A plane figure that has four sides and four angles is called a _____. quadrilateral
A plane figure with four congruent (equal) sides and four right angles is a _____. square
A four-sided figure with right angles and with opposite sides that are parallel is a _____. rectangle
A plane figure with four sides whose opposite sides are parallel and equal to each other is a _____. parallelogram
A parallelogram whose sides are all equal is a _____. rhombus
A figure with four sides but with only two sides that are parallel is a _____. trapezoid
the sum of all the sides (s + s + s) perimeter
length times width (l x w) area
length times width times height (l x w x h) volume
Created by: elfmother91