Lines
Angles
Triangles
Circles
Polygons
100
contains every point on the line that is between its endpoints.
What is a line segment ?
100
An angle which is measuring less than 90 degrees
What is an acute angle ?
100
Equilateral
What do call a triangle when all three sides are equal ?
100
3.14...
What is Pi ?
100
The number of sides in a trapezoid
What is four ?
200
a line with a single endpoint (or point of origin) that extends infinitely in one direction.
What is a ray ?
200
When the sum of two angles is equal to 90 degrees
What are complimentary angles ?
200
It has one angle between 90 and 180 degrees
what is an obtuse triangle ?
200
a straight line passing from side to side through the center of a circle.
what is the diameter ?
200
A stop sign is one of these polygons
What is an octagon ?
300
lines that do not intersect or meet each other at any point in a plane.
What are Parallel lines ?
300
When the two angles add to 180°
What are supplementary angles ?
300
the base angles of one of these triangles are equal
What is an isosceles triangle ?
300
What is the formula for the area of a circle ?
300
A polygon with 7 sides
What is an heptagon ?
400
a straight line that makes the right angle (90 degrees) with the other line.
What is a perpendicular line ?
400
When two parallel lines are crossed by a transversal, the pair of angles formed on the inner side of the parallel lines, on opposite sides of the transversal
What are alternate interior angles ?
400
The formula for the Pythagorean Theorem
what is a2+b2 = c2 ?
400
the enclosing boundary of a curved geometric figure, especially a circle
What is the circumference ?
400
It serves as the headquarters of the U.S. Department of Defense.
What is the Pentagon ?
500
a line that cuts a shape exactly in half.
What is a line of symmetry
500
When two parallel lines are crossed by another line (called the Transversal), these are the angles in the matching corners
What are corresponding angles ?
500
Obtuse/Scalene Triangle
What do you call a triangle that has an obtuse angle and three different sides ?
500
Given a triangle, the circle that passes through all three vertices of the triangle.
What is the circumscribed circle ?
500
A polygon with 12 sides
What is a Dodecagon ?