A big painting Whiteboard exercise Play

A shortcut Animation Play

Application of the Pythagorean theorem in 2-D Class activity Play

Application of the Pythagorean theorem in 2-D Whiteboard presentation Play

Checking the triangle Animation Play

Checking the triangle in the coordinate system Whiteboard exercise Play

Formula for the diagonal of a square Animation Play

Formula for the height of the equilateral triangle Animation Play

Miscellaneous problems Student activity Play

Proof Animation Play

Radius of inscribed and circumscribed circles Animation Play

The area and the height of the rhombus Whiteboard exercise Play

The area of the rhombus Whiteboard exercise Play

The circle and the equilateral triangle Whiteboard exercise Play

The circle and the equilateral triangle Student activity Play

The diagonal of a square Whiteboard exercise Play

The diagonal of a square Student activity Play

The distance between the points Animation Play

The distance between the points in the coordinate system Whiteboard exercise Play

The distance between the ships Animation Play

The distance formula Student activity Play

The distance formula – applications Student activity Play

The equilateral triangle Student activity Play

The handrail along stairs Whiteboard exercise Play

The height of the equilateral triangle Whiteboard exercise Play