Question

Question 68

Open your geometry box. there are some drawing tools. Observe them and complete the following table.

$\begin{array}{ccc}& \text{Name of the tool}& \text{Number of lines of symmetry}\\ \left(i\right)& \text{The Ruler}& ---\\ \left(ii\right)& \text{The Divider}& ---\\ \left(iii\right)& \text{The Compass}& ---\\ \left(iv\right)& \text{The Protractor}& ---\\ \left(v\right)& \text{Triangular piece with two equal sides}& ---\\ \left(vi\right)& \text{Triangular piece with unequal sides}& ---\end{array}$

Answer 1

(i) Ruler

It has two lines of symmetry.

(ii) Divider

It has only one line of symmetry.

(iii) Compass

Since, both the sides of a compass are not identical. Therefore, it has no line of symmetry.

(iv) Protractor

Since a protractor has a shape of a semi-circle and a semi-circle has only one line of symmetry.

(v) A triangular piece with two equal sides

It has one line of symmetry.

(vi) A triangular piece with unequal sides

Since, all the sides are unequal, therefore, it has no line of symmetry.

$\begin{array}{ccc}& Nameofthetool& Numberoflinesofsymmetry\\ \left(i\right)& TheRuler& 2\\ \left(ii\right)& TheDivider& 1\\ \left(iii\right)& TheCompass& 0\\ \left(iv\right)& TheProtractor& 1\\ \left(v\right)& Triangularpiecewithtwoequalsides& 1\\ \left(vi\right)& Triangularpiecewithunequalsides& 0\end{array}$