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Area of a triangle - "side and two angles" (AAS or ASA) method
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Perimeter of figures
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Length of an arc, the Huygens formula
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isosceles triangle
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Triangles
Side of a triangle
Height of a triangle
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Median of a triangle
Sides of an isosceles triangle
Height, Bisector and Median of an isosceles triangle
Sides of a right triangle
Height of a right triangle
Bisector of a right triangle
Median of a right triangle
Height, Bisector and Median of an equilateral triangle
All geometry formulas for any triangles
Parallelogram
Sides of a parallelogram
Diagonals of a parallelogram
Angles of a parallelogram
Angles between diagonals of a parallelogram
Height of a parallelogram and the angle of intersection of heights
The sum of the squared diagonals of a parallelogram
The length and the properties of a bisector of a parallelogram
All formulas for parallelogram
Trapezoid
Side of a trapezoid
Diagonal of a trapezoid
Midline of a trapezoid
Height of a trapezoid
Sides of an isosceles trapezoid
Diagonals of an isosceles trapezoid
Midline of an isosceles trapezoid
Height of an isosceles trapezoid
Sides (bases) of a right trapezoid
Lateral sides and height of a right trapezoid
Diagonal of a right trapezoid
Midline of a right trapezoid
All basic formulas for trapezoid
Rhombus
Side of a rhombus
Diagonals of a rhombus
Angles of a rhombus
All formulas of a rhombus
Circle
Length of a chord of a circle
Height of a segment of a circle
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Difference of trigonometric functions (sine, cosine, tangent)
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Written by
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Published: 05 July 2019
Last Updated: 18 July 2019
Trigonometry
Sum of angles
Difference of angles
Double angle
Triple angle
Half-angle
Functions squared
Functions cubed
Sum of functions
Difference of functions
Product of functions
All basic formulas of trigonometric identities
Geometry
Area of plane shapes
Surface Area
Perimeter of figures
Volume of geometric shapes
Radius of a circumscribed circle
Radius of a circle inscribed
Geometry theorems
Trigonometric identities
Triangles
Parallelogram
Trapezoid
Rhombus
Circle