19:54

Similarity in Right Triangles

20:35

Area of a Rectangle, Triangle, Circle & Sector, Trapezoid, Square, Parallelogram, Rhombus, Geometry

16:19

Triangles: Similar Right Triangles, Geometric Mean

11:03

Geometry - Isosceles and Equilateral Triangles

14:21

Precalculus - Vector Basics

21:05

Geometry - Similarity

6:42

Using the geometric mean to determine the missing parts of a triangle

13:03

Pythagorean theorem | Right triangles and trigonometry | Geometry | Khan Academy