exam Maths Puzzle Numerical Ability

a/a'=b/b'=c/c' we made a triangle ABC to determine the lenght of a lake, then @ the top of the big triangle we made a smaller triangle BDE according to said formula we know ABC=BDE

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exam Other Question

3) Use the geometric sequence of numbers 1, 1/3, 1/9 , 1/27� to find the following:
a) What is r, the ratio between 2 consecutive terms?
Answer:
Show work in this space. Write the standard form of an equation of the line that passes through each pair of points:

(-5,7), (0,1/2)