Solve for x. Assume that lines which appear to be diameters are actual diameters

Mathematics

1 answer:

VladimirAG [237]2 years ago

6 0

11) The sum of the marked angles is 180°.
65 +10x -5 = 180
10x = 120
x = 12 . . . . . selection D

12) The sum of the marked angles is 360°.
20x +11 +75 +154 = 360
20x = 120
x = 6 . . . . . selection C

13) The marked angles are equal.
9x +5 = 11x -5
10 = 2x
x = 5 . . . . . selection D

14) The sum of the marked angles is 180°.
16x +116 = 180
16x = 64
x = 4 . . . . . selection C

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