UPSKILL MATH PLUS

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ABCD is a quadrilateral with diagonal AC in which P, Q, R and S are mid-points of the sides AB, BC, CD and DA. If AC is 15 cm:
 
(i) The length of PQ =  cm
 
(ii) The sum of the lengths of SR and PQ =  cm
 
[Note: Insert decimal point if necessary.]
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