When lines, rays, line segments or figures meet, they share a common point.
What is the point of intersection?
100
An angle that measures between 90 and 180 degrees.
What is an obtuse angle?
100
A polygon whose sides are all the same length, and whose angles are all the same.
What is a Regular polygon?
100
A planar region or the surface of a solid measured in square units.
What is an area?
100
The shape of a particular two-dimensional "slice" of a space figure.
What is a cross-section?
200
A "straight" line that begins at a certain point and extends forever in one direction.
What is a ray?
200
Two angles' degree measurement sum equals 180 degrees.
What are Supplementary angles?
200
The point where two rays that form an angle intersect.
What is a vertex?
200
The area of a rectangle.
What is the product of the width and length?
200
It measures the space a figure takes up.
What is the volume?
300
A "straight" line that does not extend forever, but has two distinct endpoints.
What is a line segment?
300
A ray that divides an angle into two equal angles.
What is an angle bisector?
300
A four-sided polygon with two pairs of parallel sides.
What is a parallelogram?
300
The area of a circle.
What is pi x r2 (r squared)?
300
A space figure that has two congruent circular bases that are parallel.
What is a cylinder?
400
Two lines that are on the same plane and never intersect.
What are parallel lines?
400
Triangles that have exactly the same size and shape.
What are congruent triangles?
400
The collection of points in a plane that are all the same distance from a fixed point.
What is a circle?
400
The sum of the lengths of all the sides of a polygon.
What is a perimeter?
400
A 4-sided space figure that has a triangle on each face of the shape.
What is a tetrahedron?
500
Two lines that are on the same plane, but intersect at a 90 degree angle.
What are perpendicular lines?
500
If two sides of a triangle are unequal, then the measures of the angles opposite of these sides are unequal, and the greater angle is opposite the greater side.
What is a Triangle Inequality Conjecture?
500
A figure that allows every line segment drawn between any two points lie entirely inside the figure.
What is a convex?
500
The distance around a circle. It is equal to Pi times the diameter of the circle.
What is the circumference of a circle?
500
A space figure that has two congruent and parallel bases that are polygons.