File:Isosceles-right-triangle.svg - Wikipedia

Clip Art Stock File Arrowup Wikipedia Filearrowupsvg - Black Triangle Transparent Background - Png Download (#5671950) - PikPng

Yoshizawa–Randlett system, Origami Wiki

File Pakistan Danger Ahead Svg Wikipedia Filepakistan - Red Triangle Shapes Clipart (#3168403) - PikPng

Heron's formula

File:Isosceles triangle made of right triangles.svg - Wikipedia

Napoleon's theorem - Wikiwand

File:Right isosceles triangle with integer sides.svg - Wikimedia

Isosceles triangle - Wikipedia

File:Isosceles-right-triangle.svg - Wikipedia

Automedian triangle - Wikiwand

We have n dots on a plane. If we connect any three dots with 3