Surface Area of a Right Circular Cone – Definition – Formula – Example Right Circular Cone Definition: (1) The surface area of a cone is sum of area of its base and lateral(side) surface. (2) The Lateral Surface Area of a cone is area of its […]
Read More →Triangle – Definition and Properties The origin of term “Triangle” from latin word tri (“Three”) and angulus means (“angles”). A “Triangle” is a simple closed curve or a three sided polygon. A triangle has three angles and three sides and three vertices. It is one of the basic shape in geometry. In Euclidean geometry any non-collinear, three points, determine a unique triangle. The triangle […]
Read More →Arithmetic Mean Definition: The sum of the numerical values of each and every observation, that is divided by the total number of observations is equal to “Arithmetic Mean”. Arithmetic Mean is also called average or mean. The Arithmetic Mean or mean or average is defined as, Symbol: X = (𝚺xi)/n X = Mean […]
Read More →Law of cosines or Cos law The law of cosines or Cos law is one of the trigonometric laws which is useful for solving the angles or sides of a triangle. For example, if all three sides of a triangle (SSS) are given, the cosine rule allows one to easily find any of the […]
Read More →Law of sines or Sine law The law of sines or Sine law is one of the trigonometric laws which is useful for solving the angles or sides of a triangle. In trigonometry, the law of Sines says that in any given triangle, the ratio of any side length to the sine of its opposite […]
Read More →Mean Value – Word problems In this lesson we will learn about mean. We will also learn how to find mean of given data and solve word problems on mean. How to calculate mean Example: (1)What is the mean of 1, 2, 5, and 4. Solution : Mean = Sum of observations/Number of observations the numbers […]
Read More →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. […]
Read More →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 […]
Read More →Common Formula’s in Maths Square Formula’s 1. (a + b) 2 = (a) 2 + (b) 2 + 2ab 2. (a – b) 2 = (a) 2 + (b) 2 – 2ab 3. (a) 2 – (b) 2 = (a + b)(a – b) 4. (x + a) (x + b) = x2 + (a + b)x + ab 5. (a + b + c)2 = a2 + b2 + c2 + 2ab […]
Read More →Trigonometric ratios in right triangles In a triangle, if any one angle is a right angle ( that is a 90 degree angle) then the triangle is called right triangle. A triangle has three sides, the longest side of the triangle is opposite of right angle called Hypotenuse, and the other two sides including the right […]
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