First, label the appropriate diagram of the parallelogram. If the diagonals are perpendicular to each other, then the sides of ABCD has to be 5.
use the equation for obtuse triangles
all four angles around E, would be obtuse, which you can figure out to be impossible, so the side can't be longer than 5
Question: On a Sunday I put two rabbits in a cage. If the number of rabbits in the cage doubles every day, on what day did the cage first have more than 100 rabbits in it?
Sunday: 2 rabbits in a cage
you are basically multiplying by a power of 2 each day because you are "doubling" the number of rabbits
2^6 = 64 and 2^7 = 128
Hence, you get Sunday, because 2^7 is the first day you have more than 100 rabbits, and 7 days is a week!
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