Ed is building a model of a house with a flat roof, as shown in the diagram. There is a chimney through the
roof. Ed will cover the roof with square tiles.
If the area of each tile is 1 square inch, how many tiles will he need?
Complete the explanation.
4 in.
Chimney
3 in.
Roof
25 in.
35 in.
Ed will need 875 tiles. The area of the roof minus the area of the chimney is 12
inches, so Ed needs 863
square inch tiles.
square