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It is known that the image of the first-order function y = - 1 / 2x + 4 intersects with the x-axis and y-axis respectively at a, B, and the edge AC = 5 of the trapezoid aobc (o is the origin) (1) Find the coordinate (2) of point C if points a and C are in the linear function y = KX + B (k, B are constants, and K
(1) If aobc is trapezoid, Ao is parallel to BC or ob is parallel to ac. 1 ° if Ao is parallel to BC, y = 4, then y = 4 and AC = 5, set point C coordinate, and use the distance formula between two points to know C (5,4) or C (11,4) 2 ° if ob is parallel to AC, that is, C (8,5), then C (5,4) or C (11,4) or C (8,5) (2) use the linear equation between two points, AC is square
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