exam Maths Puzzle Numerical Ability

please explain to us what mean the word [cinqueens] thanks

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Floor plans for a building have the 4 corners of room located at the points (2,3)(11,6),(-3, 18) and (8, 21). Determine4 whether the side through the points (2,3) and (11, 16) is PLEASE HELP ME SOLVE THIS PROBLEM: CAN A GIVEN POINT BE IN TWO LINES? IN TEN LINES?