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  3. The sum of the lengths of two sides of isosceles triangle K is 7. K has a side o

The sum of the lengths of two sides of isosceles triangle K is 7. K has a side o

游客2024-01-12  67
问题 The sum of the lengths of two sides of isosceles triangle K is 7. K has a side of length 4.

Column A                     Column B
The perimeter of K            11
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 D
解析 等腰三角形(isosceles triangle)K的两条边的和为7，K有一条边的长为4。
解：本题的正确答案为(D)。该题可分两种情况：(1)7是两腰的和，则4是底边长，K的周长等于11； (2)若7是腰与底边和，则腰长可能为3，也可能为4。当腰长为3时，对应K周长等于10；当腰长为4时，对应K的周长等于11。
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