17 terms

These are some of the most important background facts for the Geometry questions on the GED

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)