‘A’ is the point ( 8 , 5 ) and ‘B’ is the point ( -4 , 1 ).

a. Calculate the length of AB.

b. Find the co-ordinates of the midpoint of AB.

Please answer fast

a. ((x2-x1)^2 + (y2-y1)^2)^(1/2)

(-4-8)^2 + (1-5)^2     144+16= 160

160^(1/2)= 12.64

b. (8-4)/2    & (5+1)/2

4/2=2    6/2=3

(2,3) is the midpoint of AB

m∠vru = 80°

m∠urw = 15°

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