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Side of triangle
To find the side of a triangle, knowing its two sides and the angle between them, you can use the cosine theorem. To do this,…
Chord length of a circle
Chord is a segment connecting any two points of a circle. The diameter of the circle, the largest chord. Chord length formula: L=2 R sin(α…
Arc length
An arc is a part of a circle. The arc length is the distance along the portion of the circle that forms the arc.The circumference…
Perimeter of a quadrilateral
A quadrilateral is a geometric figure with four sides and the same number of corners. Finding the perimeter of a quadrilateral is very easy! To…
Perimeter of a parallelogram
A parallelogram is a quadrilateral in which opposite sides are pairwise equal and parallel to each other. By the property of a parallelogram, its opposite…
Rhombus perimeter
A rhombus is a parallelogram with all sides equal. The perimeter of a rhombus is equal to the sum of the lengths of all sides.…
Perimeter of a rectangle
A rectangle is a quadrangle with four right angles and sides that are equal in pairs. The perimeter of a rectangle is the sum of…
Perimeter of the trapezoid
A trapezoid is a quadrilateral with exactly one pair of opposite sides parallel. The perimeter of a trapezoid is equal to the sum of all…
Circumference
Often a circle is called the part of a plane that is bounded by a circle. Find the length of a circle, which is often…
Find the perimeter of a square
A square is a quadrangle in which all sides are equal and the angles between the sides are also equal. All corners of the square…