I picked up 15 shells and my brother picked up 3 more shells than I did. How many shells sis my brother and I picked altogether?
2 answers:
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That's just the distance between 2 points
the distance between (x1,y1) and (x2,y2) is
we can find the distance between S and Q or P and R
S and Q is (0,0) and (a,b)
distance between P and R is between(0,b) and (a,0)
so the lengths of diagonals are congruent
the distance between (x1,y1) and (x2,y2) is
we can find the distance between S and Q or P and R
S and Q is (0,0) and (a,b)
distance between P and R is between(0,b) and (a,0)
so the lengths of diagonals are congruent