The Sum of the Angles of a Triangle

Author:: Jesse Parete

Topic:: Angles, Geometry, Triangles

Use the two sliders to move copies of the two angles B and C next to to angle A to fill the semi-circle marking the 180 degree straight angle atop the triangle.

New Resources

Open Middle: Horizontal and Vertical Distances (V2)
GCD of Three Numbers (Practice Exercise)
Factors of Positive Integers
Geodätische Kuppel
Water Molecule

Discover Resources

longSun-2
Optics of the Human Eye
Decimals
روسومات الدوال الأم
Percent Increase and Decrease with Equations: IM 7.4.8

Discover Topics

Expected Value
Parallelogram
Integers
Exponent
Definite Integral