MINI #18 - AREAS OF IRREGULAR CONVEX POLYGONS Plane Geometry Video by Art of Problem Solving's Richard Rusczyk.
MINI #10 - SQUARES OF BINOMIALS & WORKING WITH REPEATING DECIMALS AND RADICAL EXPRESSIONS Algebraic Expressions and Equations Video by Art of Problem Solving's Richard Rusczyk.
MINI #43 - USING SIMILARITY TO SOLVE GEOMETRY PROBLEMS Plane Geometry Proportional Reasoning Solid Geometry Video by Art of Problem Solving's Richard Rusczyk.