The Basics
Special Angles and Lines
Triangles
Quadrilaterals
Names of Polygons
100
A path of points that are never ending in two directions.
What is a line?
100
The name of a type of angle with a square corner.
What is a right angle?
100
A triangle with all acute angles.
What is an acute triangle?
100
This quadrilateral has four right angles, but the sides may not all be the same length.
What is a rectangle?
100
A polygon with three sides.
What is a triangle?
200
Part of a line that has two endpoints.
What is a line segment?
200
The name of a type of angle that is smaller than a right angle.
What is an acute angle?
200
A triangle with one right angle and two acute angles.
What is a right triangle?
200
This quadrilateral has four right angles and four sides that are the same length.
What is a square?
200
A polygon with four sides.
What is a quadrilateral?
300
An exact location in space.
What is a point?
300
Lines that never intersect.
What are parallel lines?
300
A triangle in which all sides are the same length.
What is an equilateral triangle?
300
This quadrilateral has only one set of sides that is parallel.
What is a trapezoid?
300
A polygon with five sides.
What is a pentagon?
400
Part of a line that has one end point and goes on and on in one direction.
What is a ray?
400
The name of a type of angle that is larger than a right angle.
What is an obtuse angle?
400
A triangle in which two sides are the same length.
What is an isosceles triangle?
400
In this quadrilateral, all opposite sides are parallel.
What is a parallelogram?
400
A polygon with six sides.
What is a hexagon?
500
Two rays that have the same endpoint, or vertex.
What is an angle?
500
Lines that intersect forming a right angle.
What are perpendicular lines?
500
A triangle in which no sides are the same length.
What is a scalene triangle?
500
In this quadrilateral, opposite sides are parallel AND all sides are the same length.
What is a rhombus?
500
A polygon with eight sides?
What is an octagon?
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