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Step-by-Step Guide to the Formula for the Area of an Annulus: Definition, Derivation, Calculator and Application

Annular Area Calculator Annuli are common geometric shapes in daily life and engineering—think of washers in mechanical parts, circular decorative patterns in architecture, the data storage area of a CD,…

mathformula 19.10.2025

Basic Formulas

The area formula of the sector ring

Annular Sector Area Calculator The definition of a sector ring is a part of an annulus cut off by a circular sector. Its axis of symmetry is the diameter of…

mathformula 02.08.2025

Basic Formulas

The area formula of an annulus

Annular Area Calculator The area of an annulus refers to the region enclosed by two concentric circles. The calculation logic for the annulus area formula involves decomposing the annulus into…

mathformula 31.07.2025

Basic Formulas

The area formula for a sector

Sector Area Calculator A sector is a figure enclosed by a center of a circle, two points on the circumference, and an arc that does not coincide with these…

mathformula 21.07.2025

Basic Formulas

The area formula of a semicircle

Semicircle Area Calculator A semicircle refers to half of a circle, that is, a shape enclosed by an arc formed by the center of the circle and two points on…

mathformula 16.07.2025

Basic Formulas

the formula for the area of an ellipse

Ellipse Area Calculator The formula for the area of an ellipse is a mathematical formula used to calculate the area of an ellipse. It is determined by the semi -…

mathformula 11.07.2025

Basic Formulas

The area formula of an equilateral triangle

Equilateral Triangle Area Calculator An equilateral triangle refers to a triangle with three sides of equal length. It is a special type of isosceles triangle: all three sides are equal…

mathformula 09.07.2025

Basic Formulas

The area formula of a rhombus

Diamond Area Calculator A rhombus is a special type of quadrilateral. All sides of a rhombus are equal in length, its diagonals are perpendicular to each other, and ( In…

mathformula 08.07.2025

Basic Formulas

the formula for the area of a trapezoid

Trapezoid Area Calculator The formula for the area of a trapezoid is a mathematical formula used to calculate the area of a trapezoid. A trapezoid is a quadrilateral where the…

mathformula 04.07.2025

Basic Formulas

The area formula of a parallelogram

Parallelogram Area Calculator A parallelogram is a quadrilateral with four sides, where two adjacent sides are parallel. In other words, it is a four-sided figure with opposite sides that are…

mathformula 03.07.2025