NCERT Solutions for Chapter: How Many Squares?, Exercise 4: Practice time

 This is one of the sides of a shape. The area of one full small square is $1 \mathrm{square} \mathrm{cm}$. Complete the shape so that its area is $4 \mathrm{square} \mathrm{cm}$.

Two sides of a shape are drawn here. Complete the shape by drawing two more sides so that its area is less than $2$ square cm.

Here is a rectangle of area $20 \mathrm{square} \mathrm{cm}$.

 Draw one straight line in this rectangle to divide it into two equal triangles. What is the area of each of the triangles$?$

Here is a rectangle of area $20 \mathrm{square} \mathrm{cm}$.

Draw one straight line in this rectangle to divide it into two equal rectangles. What is the area of each of the smaller rectangles$?$

Draw two straight lines in this rectangle to divide it into one rectangle and two equal triangles. What is the area of the rectangle$?$ What is the area of each of the triangles$?$(consider area of one small square is equal to $1 \mathrm{square} \mathrm{cm}$)