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Geometry Vocabulary

A set of images that relate to Math vocabulary in Geometry, Perimeter & Area for Grade 3

PRESENTATION OUTLINE

Parallel

Lines that are the same distance apart
Photo by Iliyan Yankov

Right angle

An angle measuring 90 degrees
Photo by cogdogblog

Adjacent

Lines or angle immediately next to each other
Photo by Anna & Michal

Congruent

Having the same shape and the same size
Photo by Jiahui Huang

Opposite

Situated on the other side; pairs of angles or sides directly opposite each other
Photo by jjMustang_79

Set

A collection of items
Photo by Horia Varlan

Venn diagram

A diagram using circles or shapes to show the relationship between sets
Photo by bezael_moi

Parallelogram

A quadrilateral with opposite sides that are parallel and of equal length and opposite sides that are equal

Rhombus

Parallelogram with four equal sides and equal opposite angles
Photo by fototastisch

Square

  • A Quadrilateral with...
  • Four equal sides
  • Four right angles
  • Opposite sides that are parallel
  • 2 diagonals that bisect at right angles
  • 4 lines of symmetry
Photo by visualpanic

Rectangle

Quadrilateral with four right angles and two pairs of equal parallel sides

Angle

The amount of turning between two lines that meet at a common point
Photo by mliu92

Side

A straight line joining the vertices of a polygon
Photo by Zyada

Diagonal

Line joining two non adjacent vertices (corners) of a polygon

Vertex

A point where: 2 per more arms of an angle meet, the adjacent sides of a polygon meet, the edges of a solid figure meet
Photo by visualpanic

Perpendicular

At right angles to the horizon OR lines that intersect at right angles
Photo by Domiriel

Acute angle

An angle measuring less than 90 degrees
Photo by jev55

Obtuse angle

Any angle between 90 and 180 degrees
Photo by huzzah16

2 dimensional

Having two dimensions, length and breadth (width)

Rectangle

A quadrilateral with: four right angles, and two pairs of opposite equal parallel sides
Photo by ecstaticist

Hexagon

A polygon with 6 sides
Photo by estherase

Pentagon

A polygon with 5 sides
Photo by afagen

Nonagon

A polygon with 9 sides

Centimeter

A metric unit for measuring length, equal to on hundredth of a metre
Photo by Skakerman

Unit

Another name for one OR Place value - the units column is the ones column
Photo by Wilson Hui

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