Angle sum of a quadrilateral

Author:mathstobie, amylava

Students move the points around to investigate the angle sum of a quadrilateral. There is also an option to show whether the quadrilateral is convex or concave.

New Resources

Isosceles Right Triangle
Deciding How New Information Affects Probability
Marion's Theorem
繪畫垂直線
Graphing Basic and Compound Inequalities

Discover Resources

CHapman.Taylor.ParallelLines.
lime crime and rose
Rhombus with fixed angles
-1 < r < 0
Example QF.2.3

Discover Topics

Sine
Tangent Line or Tangent
Power Functions
Vectors
Upper and Lower Sum or Riemann Sum