MINI #11 - TANGENT SEGMENTS & SIMILAR TRIANGLES Plane Geometry Proportional Reasoning Video by Art of Problem Solving's Richard Rusczyk.
MINI #32 - USING ALGEBRA AND NUMBER SENSE AS SHORTCUTS Algebraic Expressions and Equations Problem Solving (Misc.) Video by Art of Problem Solving's Richard Rusczyk.
MINI #51 - MORE SHORTCUTS USING ALGEBRA AND NUMBER SENSE Algebraic Expressions and Equations Video by Art of Problem Solving's Richard Rusczyk.
MINI #68 - SOLVING COMPLEX ALGEBRAIC EQUATIONS Algebraic Expressions and Equations Video by Art of Problem Solving's Richard Rusczyk.
Mini #4 (Part 1) - Algebra/Manipulating Equations Algebraic Expressions and Equations Video by Art of Problem Solving's Richard Rusczyk.