Category: Flat figures
The length of the sides of the rectangle
A rectangle is a quadrilateral with all angles equal to 90 degrees. Find the side length of a rectangle by knowing the diagonal and the…
Equilateral triangle side length
An equilateral, or conformal, triangle is a regular polygon with three sides, the simplest of regular polygons. All sides of a regular triangle are equal…
Length of base of an isosceles triangle
An isosceles triangle is a triangle in which the two sides are equal in length. Equal sides are called lateral, and the last unequal side…
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…