SAT Math / Geometry

Triangle Properties

Part of the full libraryOpens January 2, 2027 · $97 for a year
What’s included
Thomas MeliSAT instructor
Pythagorean theoremThe rule that in a right triangle, the squares of the two shorter sides add up to the square of the longest side: a² + b² = c².

You’ll leave with these skills

  1. Find a triangle’s longest side from its anglesFind the triangle’s largest angle and pick the side across from it as the longest side.
  2. Find a triangle’s missing angleSubtract the two known angles from 180 degrees.
  3. Check whether three side lengths can form a triangleAdd the two shorter sides and check that the sum is greater than the longest side.

This lesson is part of the full library

207 lessons that teach every skill the SAT tests
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  • A Desmos simulator to solve math questions faster
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