Straight Line With Points Divided Into Equal Parts
An illustration of a straight line with 5 points dividing it into 4 equal parts. Multiple of a given…
Right Angles With Same Vertex
An illustration showing when one straight line meets another straight line and makes the adjacent angles…
Adjacent Angles
An illustration of two angles that are adjacent. They have the same vertex and a common side between…
Straight Angle
An illustration showing a straight angle. When the sides of an angle extend in opposite directions,…
Acute Angle
An illustration showing an angle the is less than a right angle. This is an acute angle.
Obtuse And Reflex Angles
An illustration showing an angle the is greater than a right angle and less than a straight angle. This…
Acute, Obtuse, Straight, Right, And Reflex Angles
An illustration showing acute, obtuse, straight, right, and reflex angles.
Vertical Angles
Vertical angles are when two angles have the same vertex, and the sides of the one are prolongations…
Supplementary Angles
Illustration of supplementary angles. Two angles whose sum is a straight angle.
Superposition of Angles
Illustration of the superposition of two angles to compare magnitudes of the same kind.
Supplementary Angles
Illustration of supplementary angles. Two angles whose sum is a straight angle. This can be used tow…
Supplementary Angles
Illustration of supplementary angles. Two angles whose sum is a straight angle. This can be used tow…
Intersecting Straight Lines
Illustration of two lines intersecting at a point. This can be used to show vertical angles.
Lines Drawn to Another Line to Form Triangle
Illustration of two straight lines drawn from a point in a perpendicular to a given line, cutting off…
Perpendicular Line Drawn to a Given Line from an External Point
Illustration showing only one perpendicular can be drawn to a given line from a given external point.
Perpendicular Line Drawn To a Given Line From an External Point
Illustration showing that the perpendicular is the shortest line that can be drawn to a straight line…
Lines Drawn From the Point C to the Extremities of the Straight line AB
Illustration showing two lines CA and CB drawn from the point C to the extremities of the straight line…
Lines Drawn From the Same Point in a Perpendicular to a Given line, Cutting Off Segments
Illustration showing two straight lines drawn from the same point in a perpendicular to a given line,…
Parallel Lines
Illustration showing two straight lines in the same plane perpendicular to the same straight line are…
Parallel Lines
Illustration showing if a straight line is perpendicular to one of two parallel lines, it is perpendicular…
Lines Cut By A Transversal
Illustration showing that a transversal is a straight line that cuts two or more straight lines.
Parallel Lines Cut By A Transversal
Illustration showing that if two parallel lines are cut by a transversal, then the alternate interior…