Question

A square wall, is covered with square tiles. There are 85 tiles altogether along the two diagonals. How many tiles are there on the whole wall???

Answer 1

Not counting the middle tile which both have we get 84 divide that by 2 because we have to diagonals we get 42 + 1 (middle tile) for one diagonal.

Answer 2

Then use pythagurus where we have a triangle where both sides are the same and the hyponus is the diagonal.

Answer 3

thanks