Question 447962
6. Find the length of the following segment created by these pairs of endpoints: (9, 6), (12, 6):
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It's a Pythagoras application
{{{d = sqrt(diffy^2 + diffx^2) = sqrt(0 + 9)}}}
d = 3
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11. Find the midpoint of the following segment created by these pairs of endpoints: (2, -6), (5, 8) 
Get the average of x and y separately.
x = (2+5)/2 = 3.5
y = (-6+8)/2 = 1
--> (3.5,1)
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Do the others the same way.