# NCERT Solutions for Class 6 Maths Chapter 11 Algebra Ex 11.2

These NCERT Solutions for Class 6 Maths Chapter 11 Algebra Ex 11.2 Questions and Answers are prepared by our highly skilled subject experts.

## NCERT Solutions for Class 6 Maths Chapter 11 Algebra Exercise 11.2

Question 1.
The side of an equilateral triangle is shown by l. Express the perimeter of the equilateral triangle using l.
Side of equilateral triangle = l
Therefore, Perimeter of equilateral triangle = 3 × side = 3l

Question 2.
The Side of a regular hexagon (see the given figure) is denoted by l. Express the perimeter of the hexagon using l.
(Hint: A regular hexagon has all its six sides equal in length.)

Side of hexagon = l
Therefore,
Perimeter of Hexagon = 6 × side = 6l

Question 3.
A cube is a three-dimensional figure as shown in the given figure. It has six faces and all of them are identical squares. The length of an edge of the cube is given by l. Find the formula for the total length of the edges of a cube.

Length of one edge of cube = l
Number of edges in a cube = 12
Therefore, total length = 12 × 1 = 12l

Question 4.
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).