Vertically Opposite Angles Theorem Vertical angles theorem or Vertically opposite angles theorem states that, If two lines intersect each other, then vertically opposite angles are equal. Given: In the above statement, given that two lines intersect each other, so let AB and CD are two lines intersect each other at O as shown in figure so […]

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   Hypotenuse of a triangle In geometry, the longest side of a right-angled triangle, the side opposite the right angle is known as hypotenuse. Pythagoras theorem applies to right triangles and states that,  The square on the hypotenuse is equal to the sum of the squares on the other two sides.  (hypotenuse)2   =    (Base)2+(Perpendicular)2    […]

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Quadrilateral – Definition – Properties There are kinds of quadrilaterals, based on the sides and angles.  1. Parallelogram 2  Rectangle 3. Square 4. Rhombus 5. Trapezium 6. kite 1.                       Parallelogram A Parallelogram is a quadrilateral, whose both pairs of opposite sides are parallel and equal in length. In above […]

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Quadrilaterals – Definition – Properties The word “quadrilateral” has two Latin words quadri, a variant of four and latus meaning is “side”.                    What is a quadrilateral A quadrilateral is a polygon, with four edges or sides and four vertex or corners. Just like as a triangle is 3 sides polygon, […]

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Properties of a Rectangle A rectangle is a two dimensional four sided polygon(quadrilateral), in which the opposite sides are equal and parallel to each other and all four angles are right angles. In figure ABCD is a rectangle.   Properties of a Rectangle A rectangle is a quadrilateral. 1. Each interior angle is a right angle. 2. […]

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Square – Properties – Formula Here we will learn, about some geometrical properties of a square. In below figure ABCD is a square. Properties of a square 1. All four sides of a square are equal or congruent. 1. All four sides of a square are equal or congruent. AB  =  BC  =  CD  =  DA 2. All […]

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Measure an angle with Protractor What is a protractor Shape of a protractor The shape of a protractor is as a semi circle.  Protractor’s upper side is curved and lower side is a straight line.The curved edge is divided into 180 equal parts, and each part is equal to a degree. Most protractors have two […]

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Tangent of a Circle  Definition & Example  In this lesson we will learn about tangent of a circle, before understanding the concept of a circle, let us know about circle. Circle   Definition: A circle is a collection of all the points in a plane, whose all points are same distance from a fix point, is called  “Circle”. […]

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Angle Formed By Two Lines and a Transversal  In above figure line l, intersects two lines m and n at the point p and q respectively. Therefore, line l is a “Transversal” for lines m and n. Four angles are formed at the points p, by line l, name of these angles as  ∠1, ∠2, ∠3, and ∠4. Four angles are formed […]

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