A church door is in the shape of a rectangle with a semi-circular arch. The rectangular part is 2m high and the door is 90cm wide. What is the distance around the whole door?
1 Answer
Nov 16, 2016
Explanation:
We have a door that is rectangular with an arch on the top. What's the perimeter?
Let's do the rectangular part first:
The bottom of the door is the 90cm width.
The sides of the door are the 2m height, or 200cm each.
So we're at
Now to the top of the door and the arch. The circumference of a circle is
We can approximate