Diagonals of Polygon’s In geometry, a line segment joining two vertices of a polygon or polyhedron, when those vertices are not adjacent is known as Diagonal. Diagonals of Polygon’s A polygon’s diagonal’s are line segments, that joining from one corner to another corner. Formula for number of diagonals = n(n-3)/2 where n is number of sides or […]
Read More →Plot Points on Cartesian Coordinate System Example: Plot the point (2, 3) and identify its position in which quadrant is located. First we will place a dot at the intersection of X and Y axis, which is the center of the Cartesian coordinate and known as the origin. From the origin, move 2 units going right. Our point is […]
Read More →Bar Graph Problems and Solutions Example: (1) Favourite colour of 200 students of a class are given in the below table. Answer the following questions with the help of the bar graph. (1) Which is the most preferred colour and which is the least preferred?(2) How many students preferred red colour? Solution: First we choose a suitable […]
Read More →Divisibility by 10 A number divisible by 10, If it has 0 (zero) in its, ones place. The multiples of 10 is 10, 20, 30, 40, 50, 60 70…. We get something common in these numbers. We see that each of these numbers has 0 in its ones place. Some more numbers like 100, 200, 1100, 1000, 4020, 5010, has 0 […]
Read More →Abacus – Explain an abacus to a child An abacus is a traditional counting tool used for arithmetic calculations. It consists of a frame with rods or wires, each containing beads that can slide back and forth. The abacus is often considered one of the earliest counting devices, and it’s still used in various cultures […]
Read More →Addition Tables – 1 to 20 Addition table for 1 1 + 1 = 2 1 + 2 = 3 1 + 3 = 4 1 + 4 = 5 1 + 5 = 6 1 + 6 = 7 1 + 7 = 8 1 + 8 = 9 1 + 9 = 10 […]
Read More →Increase and Decrease Percentage Before learn calculating, percentage increase and decrease we will see that what is a percentage? Definition: A Percent is a number or ratio expressed as a fraction of 100, in other words Percent is a fraction of denominator 100. Percent is denoted by the symbol %. ‘Per’ ‘cent’ means out of 100. The […]
Read More →Elements of a Set Definition: A number, letter or any object contained in a set is known as “Element of the set”. Example 1: Let set A = {1, 2, 3} so the elements of set A are 1, 2 and 3. let see this example in Venn diagram, […]
Read More →Solutions – Union and Intersection of two Sets 1.If X and Y are two sets such that X∪Y has 40 elements, X has 22 elements and Y has 30 elements, how many elements does X∩Y have? Solution: Given that n(X∪Y) = 40, n(X) = 22, and n(Y) = 30, n(X∩Y)= ? By using the formula n(X∪Y) […]
Read More →Finite and Infinite Sets Definition – Examples – Properties Definition: Finite Sets If a set contains finite or limited or (countable) number of elements is called Finite Set. Examples of finite sets: Example: (i) The vowels in English alphabets. A = {a, […]
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