Look at the rectangle below.
Side AB is 4.8 cm long and side AD has a length of 12 cm.
What is the perimeter of the rectangle?
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Look at the rectangle below.
Side AB is 4.8 cm long and side AD has a length of 12 cm.
What is the perimeter of the rectangle?
In the drawing, we have a rectangle, although it is not placed in its standard form and is slightly rotated,
but this does not affect that it is a rectangle, and it still has all the properties of a rectangle.
The perimeter of a rectangle is the sum of all its sides, that is, to find the perimeter of the rectangle we will have to add the lengths of all the sides.
We also know that in a rectangle the opposite sides are equal.
Therefore, we can use the existing sides to complete the missing lengths.
4.8+4.8+12+12 =
33.6 cm
33.6 cm
Look at the rectangle ABCD below.
Side AB is 6 cm long and side BC is 4 cm long.
What is the area of the rectangle?
In a rectangle, opposite sides are always equal. So if AB = 4.8 cm, then CD also equals 4.8 cm. If AD = 12 cm, then BC also equals 12 cm. The perimeter includes all four sides!
Yes! That's actually faster: P = 2(12 + 4.8) = 2(16.8) = 33.6 cm. Both methods give the same answer, so use whichever feels easier to you.
Not at all! The orientation doesn't change the side lengths or perimeter. Whether the rectangle is upright, tilted, or rotated, the measurements stay the same.
Multiplying gives you the area (4.8 × 12 = 57.6 cm²), not the perimeter! Remember: perimeter is the distance around the shape, so you add all the sides.
Use both methods! First add all four sides: 4.8 + 4.8 + 12 + 12. Then try the formula: 2(4.8 + 12). If you get 33.6 cm both ways, you're correct!
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