dalvin1124 dalvin1124

18-12-2020
Mathematics

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In quadrilateral ABCD, AC = x +9 and BD = 2x-11 For what value of x is ABCD a rectangle?

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sqdancefan sqdancefan

18-12-2020

9514 1404 393

Answer:

20

Step-by-step explanation:

The figure will be a rectangle when the diagonals AC and BD are the same length:

AC = BD

x +9 = 2x -11

20 = x . . . . . . . add 11-x to both sides

ABCD will be a rectangle when x=20.

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