geometry
posted by poppy .
a playground is 50 yd by 50 yd. amy walked across the playground from one corner to the opposite corner. how far did she walk.

She's walked the hypotenuse of a right angle triangle.
a^2 + b^2 = c^2
50^2 + 50^2 = c^2
2500 * 2500 = c^2
5,000 = c^2
70.71 yd = c