I nailed it Mr. Nelson #11

Author:nelsone

The altitudes of any triangle meet at a single point called the ORTHOCENTER. (An altitude is the perpendicular line segment from a vertex of a triangle to the opposite side of the vertex.)

New Resources

Parabolas, Lines and Nomograms
Midpoint Theorem Questions: Mild
Function art 3D - waiting shed
繪畫垂直線
Pythagorean Theorem: Quick Illustrator

Discover Resources

ΙΤΑ - Συμμετρική ρητής συνάρτησης ως προς τον άξονα yy'
Transformations
Venn Diagrams
Untitled
Area of Any Triangle

Discover Topics

Probability
Fractal Geometry
Trigonometry
Normal Distribution
Continuity