Question 117492
You need to build a triangular shelf that fits into a right-angled corner.  The sides of the triangle that are against the walls are each 1 foot long.  How long do you need to cut the piece of moulding that dresses up the edge of the shelf that faces outward?  (Hint:  the edge that faces outward is the hypotenuse of an isoceles right triangle with legs of 1.


Apply Pythagoras:


{{{c=sqrt(1^2+1^2)=sqrt(2)}}}