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Geometry guide
| Date post: | 12-Jul-2015 |
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Education |
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Geometry guide
line
A specific line going in one direction that never ends.
Skew
Two lines that are not in the same plane.
point
A specific dot in space.
Line segment
A straight line that links two points.
Parallel lines
two lines that don't intersect.
Intersecting lines
Two lines that intersect.
angle
Two lines that meet at a vertex.
complementary
two angles that add up to 90 degrees
+
45 45
Supplementary
Two angles that add up to 180 degrees.
+
90 90
obtuse
An angle that is bigger than 90 degrees.,
Right
An angle that is exactly 90 degrees.
acute
An angle that is smaller than 90 degrees.
Triangle
A shape with 3 sides.
Obtuse triangle
A triangle that It's biggest angle is more than 90 degrees.
Acute triangle
A triangle that it's biggest angle as an acute angle.
Right triangle
A triangle that it's biggest angle is a right angle.
Quadrilateral
Any shape with 4 sides
Square
A shape with 2 pairs of congruent and parallel sides.
rectangle
A shape with 4 right angles
trapezoid
A shape with 4 sides ad only one pair of parallel sides.
parallelogram
A flat shape with four sides in which each side is the same length as the side opposite.
Circle
A shape that has no corners.
ray
The measurement from the middle of a circle to the edge of a circle.
diameter
The distance from one side of the circle to the opposite side the circle.
chord
One point on on a circle connected to another point.
area of a circle
The distance inside of a circle.
circumference
The distance or measurement around the outside of a circle or any round shape.
arc
The distance on the out side edge.
sector
A piece of the area.
polygon
A flat shape with three or more sides.
hexagon
A shape with six sides.
pentagon
A flat shape with five sides and five angles.
Octagon
A flat shape with eight sides and eight angles.
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