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A 20-foot ladder leaning against a vertical wall with the base of the ladder 10 feet from the wall is pulled 2 feet farther out from the wall，causing the top of the ladder to drop X feet．
（）

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A、 if the quantity in Column A is greater;
B、 if the quantity in Column B is greater;
C、 if the two quantities are equal;
D、 if the relationship cannot be determined from the information given.

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Triangular garden ABC is redesigned by increasing the length of AC by 20 percent to point C’and decreasing the length of AB by20 percent to point B’．（）

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The diagram represents a rectangular garden．The shaded regions arc planted in flowers，and the unshaded region is a walk 2 feet wide． All angles are right angles．（）

A 20-foot ladder leaning against a vertical wall with the base of the ladder 10 feet from the wall is pulled 2 feet farther out from the wall，causing the top of the ladder to drop X feet． （）

A 20-foot ladder leaning against a vertical wall with the base of the ladder 10 feet from the wall is pulled 2 feet farther out from the wall，causing the top of the ladder to drop X feet．
（）