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Transcript
MPM1D/G Geometry Theorems Sheet ANY time you are asked to calculate a missing angle or side you must give the reasoning. Here are some short forms. Add to the list as we go through the unit. ITT SAT CAT OAT PLT – Z PLT – C PLT - F ASTT Isosceles Triangle Theorem EAT Exterior Angles Theorem IETST Interior Exterior Triangle Sum Theorem SIAQT Sum of Interior Angles in a Quadrilateral is 360o Sum of Exterior Angles in a Quadrilateral is 360o Sum of Interior Angles in a Polygon is 180o(#sides-2) Diagonals of a Parallelogram bisect each other Midpoints of a Quadrilateral form a Parallelogram *Triangle Midsegments are parallel to the 3rd side and half the length of 3rd side *The height of a triangle formed by a midsegment is half that of the original triangle The Median of a Triangle Bisects its area SEAQT SIAPT DPT MQPT TMsT TMdT Supplementary Angle Theorem Complementary Angle Theorem Opposite Angle Theorem Transversal Parallel Lines Theorem (Alternate) (Corresponding) (Co-interior) Angle Sum Triangle Theorem
