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Area of plane shapes
Area of a triangle
Area of a right triangle
Heron's formula for area
Area of an isosceles triangle
Area of an equilateral triangle
Area of a triangle  "side angle side" (SAS) method
Area of a triangle  "side and two angles" (AAS or ASA) method
Area of a square
Area of a rectangle
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Area of a rhombus
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Area of an isosceles trapezoid
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Area of a circle
Area of a sector of a circle
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Area of an annulus
Area of a sector of an annulus
Area of an ellipse
All formulas for area of plane figures
Surface Area
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Perimeter of figures
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Circumference of a circle
Length of an arc
Length of an arc, the Huygens formula
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Volume of geometric shapes
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Radius of a circumscribed circle
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isosceles triangle
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Radius of a circle inscribed
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Triangles
Side of a triangle
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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
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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
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Trapezoid
Side of a trapezoid
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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
All formulas of a circle
Password Protect PDF
Password Protect PDF
How to find area of a circle with diameter
Details
Written by
Administrator
Published: 10 July 2019
Last Updated: 18 July 2019

radius

diameter
3,14
Calculate the Area of a circle if given radius or diameter (
A
) :
area of a circle :
=
Digit
2
1
2
4
6
10
F
A
=
area of a circle :
=
Digit
2
1
2
4
6
10
F
A
=
Area of plane shapes
Area of a triangle
Area of a right triangle
Heron's formula for area
Area of an isosceles triangle
Area of an equilateral triangle
Area of a triangle  "side angle side" (SAS) method
Area of a triangle  "side and two angles" (AAS or ASA) method
Area of a square
Area of a rectangle
Area of a parallelogram
Area of a rhombus
Area of a trapezoid
Area of an isosceles trapezoid
Area of a regular polygon
Area of a circle
Area of a sector of a circle
Area of a circular segment
Area of an annulus
Area of a sector of an annulus
Area of an ellipse
All formulas for area of plane figures
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