Rhombus A rhombus is a quadrilateral whose four sides all have the same length.A rhombus has four equal sides, opposite sides that are parallel, equal opposite angles and diagonals that bisect at right angles. Diagonals are DB = d1 and AC = d2 DB ⊥ AC Properties of Rhombus Reference All sides of a […]
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Rectangle
Rectangle A rectangle is a quadrilateral in which all the angles are equal and the opposite sides are equal and parallel. A rectangle has two pairs of opposite equal parallel sides, four right angles and two diagonals. Diagonal AC = diagonal BD Diagonal AC = d Applying Pythagoras theorem to the triangle ABD, d2 = l2 + w2 l […]
Rounding
Rounding – Approximate Rounding off means replacing a number with an approximate value. Example: A route takes 56 minutes to be covered, thus, it can be considered «a one-hour journey». To estimate a number, amount or total, often rounding it off to the nearest 10 or 100. Rounding Rulesmore than 5 > upless than 5 […]
Regular Polygon
Regular polygon Regular polygons have all sides equal and all angles equal. Angle formulas for regular polygons n – the number of sides Area and perimeter of regular Polygons Area = (n × a × apothem) / 2 r – apothem is the radius of the inner circle […]
