AMC8 2003

AMC8 2003 · Q6

AMC8 2003 · Q6. It mainly tests Triangles (properties), Area & perimeter.

Given the areas of the three squares in the figure, what is the area of the interior triangle?

给定图中三个正方形的面积，内部三角形的面积是多少？

(A) 13 13

(B) 30 30

(D) 300 300

(E) 1800 1800

Answer

Correct choice: (B)

正确答案：（B）

Solution

$A = \frac{1}{2} (\sqrt{144}) (\sqrt{25}) = \frac{1}{2} \cdot 12 \cdot 5 = 30$ square units.

$A = \frac{1}{2} (\sqrt{144}) (\sqrt{25}) = \frac{1}{2} \cdot 12 \cdot 5 = 30$ 平方单位。

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