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17 terms

GED Geometry Facts

These are some of the most important background facts for the Geometry questions on the GED
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What do you call a 3-sided shape?
Triangle
What do you call a 4-sided shape?
Quadrilateral
What do you call a 5-sided shape?
Pentagon
What do you call a 6-sided shape?
Hexagon
What do you call a 7-sided shape?
Heptagon
What do you call a 8-sided shape?
Octagon
What do you call a 9-sided shape?
Nonagon
What do you call a 10-sided shape?
Decagon
Shat is the line segment called that goes from the center of any circle out to a point on the circle?
Radius
What is the name of the segment that is the same length of TWO radii of any circle?
Diameter
What is the symbol "π" called?
Pi (the Greek letter)
How big is "π" about?
3.14
What is the perimeter of a circle called?
Circumference
The three angles of ANY triangle always add up to ___ ?
180°
If you measure all the sides of a triangle in inches, then what are the units of perimeter?
inches
If you measure the sides of a triangle in inches, then what are the units of Area?
sq. inches (or in²)
If you measure the sides of a Triangular Prism in inches, then what are the units of Volume?
cubic inches (or in³)