单项选择题

If a and b are the lengths of the legs of a right triangle whose hypotenuse is 10 and whose area is 20,what is the value of (a +b)²（）

A. 100
B. 120
C. 140
D. 180
E. 200

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多项选择题

In triangle ABC, AB=AC=2. Which of the following could be the area of triangle ABC Indicate all possible areas. （）

A. 0.5
B. 1.0
C. 1.5
D. 2.0
E. 2.5
F. 3.0

单项选择题

（）

A. if Quantity A is greater;
B. if Quantity B is greater;
C. if the two quantities are equal;
D. if you cannot determine the relationship based on the given information.

If a and b are the lengths of the legs of a right triangle whose hypotenuse is 10 and whose area is 20,what is the value of (a +b)2（）

If a and b are the lengths of the legs of a right triangle whose hypotenuse is 10 and whose area is 20,what is the value of (a +b)²（）