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Geometry Cheat Sheet by

math

45/45/90

Quadla­terals

Oppisite sides are congruent. Diagonals are congruent
Rhombus
Diagonals are perpen­dic­ular. Not all sides are congruent
Kite
Diagonals are congruent. Opposite angles are not
Insoles trapezoid
Diagonals bisect each other. Not all sides are congruent. Not all angles are congruent
parall­elogram
 

Formulas

Area of a trapezoid
a = 1/2h (b1+ b2)
Area of a kite
A = ½ (d1xd2)
Area of a Rhomubs
A = ½ (d1xd2)
Pythag­orean Theorm
a2+ b2 = c2
Side splitter
Step 1: cross multiply Step 2: solve for x
Arc length
Arc measure/ 360x2πr
Area of a sector
Measur­eme­nt/­sector (2πr)
Area of a segment
Area of a sector- measur­e/360 (πr2) - 1/2h

Quadri­lateral diagram

 

30/60/90

Arc length

 

Parall­el/­Tra­nsv­ersal

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