What is Perimeter?
A perimeter is a path that encompasses/surrounds a two-dimensional shape. It can be thought of as the length of the outline of a shape.
Try the problem from AMC UP, 2014- Problem 11
These two squares, each with a side length of 10 cm, overlap as shown in the diagram. The shape of the overlap is also a square which has an area of 16 square centimeters. In centimeter s, what is the perimeter of the combined shape?
Australian Mathematics Competition (AMC UP), 2014, Problem No. 11
2 out of 10
Elementary Algebra by Hall and Knigh
Use some hints
Find the Perimeter of 2 boxes
\((4 \times 10) \times 2\)
The perimeter of small box
\(4 \times 4\)
So the remaining boxes Space perimeter is 80 – 16 = 64 cm