Which ones are right triangles and not a right triangle? A.5,5,10
B.3,4,7
C.12,16,20
D.4.5,6,7.5
E.11,60,61
F.6,9,10
G.3,4,12
H.8,15,17

How many different ways can you make change for $.50 using only nickels, dimes, and quarters?

What is the missing constant term in the perfect square that starts with x^2 -20x

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.