**Understanding Elementary Shapes**

**Question 1.Say True or False:**

**(a)**Each angle of a rectangle is a right angle.

**(b)**The opposite sides of a rectangle are equal in length.

**(c)**The diagonals of a square are perpendicular to ont i^Atber.

**(d)**All the sides of rhombus are of equal length.

**(e)**All the sides of a parallelogram are of equal length.

**(f)**The opposite sides of a trapezium are parallel.

**Solution:****(a)** True**(b)** True**(c) **True**(d)** True**(e)** False**(f)** False

**Question 2.Give reasons for the following:**

**(a)**A square can be thought of as a special rectangle.

**(b)**A rectangle can be thought of as a special parallelogram.

**(c)**A square can be thought of as a special rhombus.

**(d)**Squares, rectangles, parallelograms are all quadrilaterals.

**(e)**Square is also a parallelogram.

**Solution:(a)** All the properties of a rectangle are there in a square.

**(b)**All the properties of a parallelogram are there in a rectangle.

**(c)**All the properties of a rhombus are there in a square.

**(d)**All the four sided closed plane figure are known as quadrilateral.

**(e)**All the properties of a parallelogram are there in a square.

**Question 3.A figure is said to be regular if its sides are equal in length and angles are equal in measure. Can you identify the regular quadrilateral?**

**Solution:**

A regular quadrilateral is a square, regular pentagon, regular hexagon, regular octagon etc.