How many faces does a tetrahedon have?
4
What do we call a polygon with eight sides?
octagon
What do we call the opposite angles of two intersecting lines?
vertical
irrational
empty set
C. prism
What do we call a parallelogram with a right angle?
rectangle or square
What do we call two angles whose measures have a sum of 90°?
complementary
What do we call a curve that is a subset of a circle?
arc
How many bases does a triangular pyramid have?
1
Give an example of a polygon with no diagonals.
triangle
What do we call two adjacent angles that are supplementary?
linear pair
What do we call a closed curve made of segments?
polygon
What is the name of the formula F-E+V=2?
Euler's Formula
What's another name for an octagonal prism?
decahedron
A figure that does not allow you to pick two interior points and join them without going outside of the figure is called _________.
concave
True or False: Angles are supplementary if and only if they form a linear pair.
False
What kind of curve ends at its starting point?
closed
What do we call the circle that results from the intersection of a sphere and a secant plane that includes the sphere's center?
great circle
What's another name for a regular hexahedron?
cube
The golden ratio is an irrational number that applies to what polygon?
rectangle
What kind of angle is inscribed in a semicircle?
right angle
T, F, T, T