Angle Sum of a Quadrilateral
See how the sum of the interior angles of any quadrilateral is 360°.
Create a quadrilateral by moving any of its vertices. What is its angle sum?
Plotting Point - CB Lesson 11-2 Q1
Length and angles in a pyramid.
Droz-Farny line on a sphere
Envelope of a family of unit circles centered on a parabola
Discovering the Pythagorean Theorem
Triangle with given sides (SSS)
Arches (Parabola, Catenary, Circular)