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…
Triangle With Segment Extended for Exterior Angle
Illustration showing a triangle with an exterior segment drawn to show and exterior angle. This can…
Acute Triangle
Illustration showing an acute triangle (one that has all three angles that are acute).
Equiangular Triangle
Illustration showing an equiangular triangle (one that has all three angles that are equal).
Triangle with Exterior Angles Drawn
Illustration showing a triangle with exterior angles. This can be used to show the sum of the three…
Isosceles Triangle With Interior Segment Drawn
Illustration showing an isosceles triangle with a segment inside. This can be used to show that in an…
Equal Triangles by Side Side Side
Illustration showing two equal triangles. This can be used to show that two triangles are equal if the…
Equal Right Triangles by Hypotenuse Leg
Illustration showing two equal right triangles. This can be used to show that two right triangles are…
Three Triangles Used to Compare Sides
Illustration showing three triangles. This is used to show the following theorem: If two triangles have…
Triangle With Bisector Parallel to the Base
Illustration of a triangle showing that when a line parallel to the base of a triangle bisects one side,…
