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Midline Theorem
Author:
Ted Courant
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GeoGebra
A triangle becomes a parallelogram, whose opposite sides are congruent. Interpret this fact in terms of the original triangle.
New Resources
Supplementary Angles
Drag that Point!
Odd or Even
Simplifying Radicals: Geometric Thin Slice
Piano. Keyboard.
Discover Resources
Corollary 2 to Theorem 19
Angry Bird Parabola (Part 1)
Triangles 30-60-90 (custom worksheet)
practice project _ Ethan Wink
Logo Lineas aereas del Noroeste
Discover Topics
Scatter Plot
Difference and Slope
Constructions
Hypergeometric Distribution
Straight Lines