Advertisements
Advertisements
प्रश्न
The expression for the number of diagonals that we can make from one vertex of a n sided polygon is ______.
विकल्प
2n + 1
n – 2
5n + 2
n – 3
Advertisements
उत्तर
The expression for the number of diagonals that we can make from one vertex of a n sided polygon is n – 3.
Explanation:
Since, the vertex is formed by joining two sides. Diagonal is a line segment joining the two opposite vertex. So, the number of diagonals formed by one vertex = n – 3.
APPEARS IN
संबंधित प्रश्न
Write down the following in the product form: 9xy2z
Write down the following in the product form: 10a3b3c3
When Raju multiplies a certain number by 17 and adds 4 to the product, he gets 225. Find that number.
Find two numbers such that one of them exceeds the other by 18 and their sum is 92.
The sum of two consecutive even numbers is 74. Find the numbers.
A man is thrice as old as his son. Five years ago the man was four times as old as his son. Find their present ages.
The two digit number whose ten’s digit is ‘t’ and units’s digit is ‘u’ is ______.
If I spend f rupees from 100 rupees, the money left with me is ______ rupees.
If m is a whole number, then 2 m denotes a multiple of 2.
If x is a negative integer, – x is a positive integer.
The side of an equilateral triangle is shown by l. Express the perimeter of the equilateral triangle using l.
The side of a regular hexagon is denoted by l. Express the perimeter of the hexagon using l.
(Hint: A regular hexagon has all its six sides equal in length.)
The diameter of a circle is a line which joins two points on the circle and also passed through the centre of the circle. (In the adjoining figure AB is a diameter of the circle; C is its centre.) Express the diameter of the circle (d) in terms of its radius (r).
Find the perimeter of the figure given below:
A wire is (7x – 3) metres long. A length of (3x – 4) metres is cut for use. Now, answer the following questions:
- How much wire is left?
- If this left out wire is used for making an equilateral triangle. What is the length of each side of the triangle so formed?
The sum of first n natural numbers is given by `1/2n^2 + 1/2n`. Find the sum of first 11 natural numbers.
The sum of the multiplication table of natural number ‘n’ is given by 55 × n. Find the sum of table of 7.
If 
= `3/4x - 2` and 
= x + 6, then find the value of:
– 
