MINI #11 - TANGENT SEGMENTS & SIMILAR TRIANGLES Plane Geometry Proportional Reasoning 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.
MINI #54 - SIMILAR TRIANGLES Plane Geometry Proportional Reasoning Video by Art of Problem Solving's Richard Rusczyk.
MINI #57 - NUMBER SENSE: LOOKING FOR PATTERNS Number Theory Video by Art of Problem Solving's Richard Rusczyk.
MINI #64 - MORE THAN ONE WAY TO SOLVE A PROBLEM Problem Solving (Misc.) Video by Art of Problem Solving's Richard Rusczyk.
MINI #66 - SIMILARITY AND PROPORTIONAL REASONING Plane Geometry Proportional Reasoning Video by Art of Problem Solving's Richard Rusczyk.
MINI #67 - OPTIMIZATION PROBLEMS Problem Solving (Misc.) Video by Art of Problem Solving's Richard Rusczyk.
MINI #71 - NUMBER SENSE PROBLEMS WITH PATTERNS AND REMAINDERS Number Theory Video by Art of Problem Solving's Richard Rusczyk.
MINI #75 - STRATEGIC GUESSING USING DIVISIBILITY RULES Number Theory Video by Art of Problem Solving's Richard Rusczyk.
MINI #86 - NON-STANDARD OPERATORS IN ALGEBRAIC EXPRESSIONS Algebraic Expressions and Equations Video by Art of Problem Solving's Richard Rusczyk.