Perimeter , Inradius OF Pedal triangle || regular polygon||M-N-theorem||Excentral triangle

Excentre of a Triangle

A triangle is a polygon with__

Pedal triangle || Ambiguous case

Perimeter of a triangle

Pedal triangle ||Circum radius OF pedal triangle and illustration ||Orthocentre , Distance OF orthocentre from vertices

Derive the formula for coordinates of excentres of a triangle?

Pedal Triangle and Ambiguous Case

Problems on Pedal Triangle and Excentre Triangle