Draw a rectangle that is 9cm long and 1/3 of its width. Calculate the perimeter and area

Draw a rectangle that is 9cm long and 1/3 of its width. Calculate the perimeter and area of this rectangle. Circle the parallel sides with colored pencils.

From the condition, we know that the length of the rectangle is 9 cm, and its width is 1/3 of the length. We need to find the perimeter and area of this rectangle.

Let’s start by calculating the width of the rectangle. To do this, we must multiply its length by 1/3 and we get:

9 cm * 1/3 = 9/3 cm = 3 cm.

Now let’s remember and apply the formula for calculating the perimeter of a rectangle:

P = 2 (a + b);

Substitute the values and calculate:

P = 2 * (9 + 3) = 2 * 12 = 24 cm.

And we will find the area as:

S = a * b = 9 * 3 = 27 cm ^ 2.