Geometry Vocabulary Students should know the meaning of these geometry terms and also be able to draw or identify pictures of these terms



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Geometry Vocabulary

* Students should know the meaning of these geometry terms and also

be able to draw or identify pictures of these terms.

* Students will be tested on all of these terms.
Lines and Angles

vertex - point at which two rays meet to form an angle

perpendicular - lines that meet at a right angle

parallel - lines that are the same distance apart (will never cross)

midpoint - the halfway point on a line segment

line segment - a section of a line, has an endpoint on each end

line - a line that never ends, continues on in both directions

ray - a line beginning from a point

acute angle - an angle that measures less than 90 degrees

right angle - an angle that measures exactly at 90 degrees

obtuse - an angle that measures greater than 90 degrees

straight angle - an angle that measures 180 degrees

Polygons

regular polygon - two dimensional shape with equal sides and angles

irregular polygon - two dimensional shape with different lengths and angles

quadrilateral - any four sided polygon

square - a quadrilateral with 4 equal sides and 4 right angles

rectangle - opposite sides are equal and all 4 angles are right angles


parallelogram - 2 pairs of parallel lines

rhombus - a shape with 4 equal sides but no right angles

trapezoid - a shape with 4 sides but only 1 set of parallel lines

pentagon - a five sided polygon

hexagon - a six sided polygon

heptagon - a seven sided polygon

octagon - an eight sided polygon
Circles and Triangles

circumference - the distance around a circle

radius - the distance from the center of a circle to the edge of a circle

diameter - the distance across the circle, passing through the center

chord - a line segment connecting one point on a circle to another point

equilateral - a triangle with all sides and angles equal

scalene - a triangle which no sides are the same length

isosceles - a triangle which has two sides the same length


  • The following websites provide additional reinforcement of our geometry skills.

http://www.math.com/practice/Geometry.html
http://www.aplusmath.com/cgi-bin/games/geomatho
http://www.bbc.co.uk/schools/ks2bitesize/maths/shape_space/shapes/play.shtml
http://www.aplusmath.com/cgi-bin/Flashcards/geoflash
http://www.proprofs.com/quiz-school/story.php?title=4th-grade-Geometry

http://www.tlsbooks.com/fourthgradeworksheets.htm
http://quizlet.com/76576/4th-grade-geometry-terms-flash-cards/




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