Blake is setting up his tent at a renaissance fair. If the tent is 8 feet tall and the tether can be staked no more than 2 feet from the tent, how long should the tether be?

The stake, height and tether length of the tent form a right angle triangle where the tether length is the hypotenuse.

Applying Pythagoras theorem:

length² = height² + (stake distance) ²

length = √ (8² + 2²)

length = 8.5 feet