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Geometry Essentials

Basic shapes and geometric ideas

M
mathwizard 13 terms Feb 28, 2026
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Terms 13

1
Point
Exact location in space with no size
2
Line
Straight path extending infinitely in two directions
3
Line Segment
Part of a line with two endpoints
4
Angle
Figure formed by two rays sharing an endpoint
5
Right Angle
Angle measuring exactly 90 degrees
6
Acute Angle
Angle less than 90 degrees
7
Obtuse Angle
Angle greater than 90 but less than 180 degrees
8
Triangle
Three-sided polygon
9
Square
Four equal sides and four right angles
10
Rectangle
Four-sided shape with four right angles
11
Circle
Set of points equidistant from a center point
12
Radius
Distance from center of circle to edge
13
Diameter
Distance across a circle through the center