Video Transcript
What is the area of a square of side 17?
Let’s consider a square of side length 17 units as shown. We know that the area of a square is equal to the side length squared. This means that in this question, the area is equal to 17 squared. Squaring a number involves multiplying it by itself, so we need to multiply 17 by 17.
One way of doing this is using the box or grid method. We split 17 into its 10s and ones, which are 10 and seven. 10 multiplied by 10 is 100. 10 multiplied by seven and seven multiplied by 10 are both 70. Finally, seven multiplied by seven is equal to 49. Adding these four values gives us a total of 289. The area of a square of side 17 is 289 square units.
