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plane figures with 3 sides

triangle

triangle

triangle
triangle (a three-sided polygon)
wikipedia
Which types of two-dimensional shape (a shape in two spatial dimensions) have the integer 3 sides (line segments forming part of the perimeter of plane figures)?
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Elementary Test Prep Math 4 (Grade 3) Geometric Shapes
Shapes can be polygons → A closed plane figure made up of line segments. A polygon with 3 sides : A polygon with 5 sides : A polygon with 8 sides
http://www.studyzone.org/testprep/math4/e/geometric3l.cfm
Plane figures
Plane figures (2-D) ... Solid Figures (3-D) ... Don't forget to scroll down & to the sides when looking ...
http://www.calstatela.edu/faculty/llemett/myweb4/plane_figures.htm
Practice with Plane Figures
Some plane figures have all straight sides and angles. The number of sides and angles will be the same. ... Plane figures are flat, closed, figures that are in a plane. Look around ...
http://www.beaconlearningcenter.com/WebLessons/PlaneFigures/default.htm
Math Forum: Ask Dr. Math FAQ: Defining Geometric Figures
What is a plane figure? What is a solid ... A two-dimensional figure, also called a plane or planar figure, is a set of line segments or sides and curve ... lie in space, and space is 3 ...
http://mathforum.org/dr.math/faq/formulas/faq.figuredef.html
plane geometry: Definition from Answers.com
plane geometry n. The geometry of planar figures. ... region of the plane. The polygon having the least number of sides (three ... Method 3. This plane can also be ...
http://www.answers.com/topic/plane-geometry

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