πŸ“’ Too many exams? Don’t know which one suits you best? Book Your Free Expert πŸ‘‰ call Now!


    Question

    In triangle ABC, vertices are A(2, 3), B(8, 5) and C(4,

    βˆ’1). Find the coordinates of the centroid and the length of the median from A.
    A √23 Correct Answer Incorrect Answer
    B √11 Correct Answer Incorrect Answer
    C √17 Correct Answer Incorrect Answer
    D √13 Correct Answer Incorrect Answer

    Solution

    Centroid G = ((x₁ + xβ‚‚ + x₃)/3 , (y₁ + yβ‚‚ + y₃)/3) x-coordinate = (2 + 8 + 4)/3 = 14/3 y-coordinate = (3 + 5 βˆ’ 1)/3 = 7/3 So G(14/3, 7/3) Median from A joins A(2,3) to midpoint of BC. Midpoint of BC: B(8,5), C(4,βˆ’1) M = ((8+4)/2, (5βˆ’1)/2) = (12/2, 4/2) = (6,2) Length AM = √[(6 βˆ’ 2)Β² + (2 βˆ’ 3)Β²] = √[(4)Β² + (βˆ’1)Β²] = √(16 + 1) = √17.

    Practice Next
    ask-question