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  3. The altitude of a certain triangular sail is 2 meters greater in length than its

The altitude of a certain triangular sail is 2 meters greater in length than its

游客2024-01-12  4
问题 The altitude of a certain triangular sail is 2 meters greater in length than its base. The area of the face of the sail is 24 square meters.

Column A                                  Column B
The length of the base of the sail        4 meters
选项 A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案 A
解析 一三角帆的高度比底边长2米，帆面的面积等于24平方米。
解：本题的正确答案为(A)。设底边边长为x米，则高为(x+2)米，由题意可得：S三角帆=1/2 x(x+2)=24 so, x=6
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