Jayashri Bhattacharya and Tarika Dhawan Solutions for Exercise 4: Unit Innings

Draw any $\Delta \mathrm{XYZ}.$ Take a point $\mathrm{O}$ in its interior. Draw a perpendicular from $\mathrm{O}$ to $\overline{\mathrm{XY}},\overline{\mathrm{YZ}}$ and $\overline{\mathrm{XZ}}$.

Draw a $\mathrm{\Delta DEF}$. Draw the angle bisector of each of its angles. What do you observe? 

Draw a line $l$. Mark a point $M$ on it. Through $M$, draw $MN$ perpendicular to $l$ using a ruler and a pair of compasses.

Draw $\overline{\mathrm{AC}}=2.9 \mathrm{cm}$. Then draw  $\overline{\mathrm{AD}}=\frac{1}{2}\overline{\mathrm{AC}}$.

What is the shape of a geometry box? Also find how many curved faces, flat faces, vertices, edges are there in a geometry box?

What is the shape of a cold drink can

Also find how many curved faces, flat faces, vertices, edges are there in each of these solids?

What is the shape of a bar of chocolate 

Also find how many curved faces, flat faces, vertices, edges are there in each of these solids?

What is the shape of a birthday cap.

Also find how many curved faces, flat faces, vertices, edges are there in each of these solids?