# Geometry Theorems Sheet - jkowalewski

Electronics - Devices

Oct 10, 2013 (4 years and 9 months ago)

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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.

to the list as we go through the unit.

ITT

Isosceles Triangle Theorem

SAT

Supplementary Angle Theorem

CAT

Co
mplementary Angle Theorem

OAT

Opposite Angle Theorem

TPLT

Transversal Parallel Lines Theorem

(Alternate) (Corresponding) (Co
-
interior)

TST

Triangle Sum Theorem

SEAT

Sum of Exterior Angles in a Triangle

IETST

Interior Exterior Triangle Sum Theorem

SI
AQT

Sum of Interior Angles in a Quadrilateral
is 360
o

SEAQT

Sum of Exterior Angles in a Quadrilateral
is 360
o

SIAPT

Sum of Interior Angles in a Polygon is

180
o
(#sides
-
2)

DPT

Diagonals of a Parallelogram bisect
eachother

MQPT

Midpoints of a Quadrilater
al form a
Parallelogram

TMsT

*Triangle Mi
d
segments are parallel to the
3
rd

side and half the length of 3
rd

side

*The height of a triangle formed by a
midsegment is half that of the original
triangle

TMdT

The Median of a Triangle Bisects its area

MPM1D/G