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In the triangle below, AB = 4, AC = 8.[img]2022m10s/ct_ve01203002j_egreqbj_0001
In the triangle below, AB = 4, AC = 8.[img]2022m10s/ct_ve01203002j_egreqbj_0001
游客
2025-02-23
28
管理
问题
In the triangle below, AB = 4, AC = 8.
Quantity A: The area of triangle ABC
Quantity B: 14
选项
A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.
答案
D
解析
题目没有告诉我们三角形的具体类型,所以无法仅从图中确定ABC是否为直角三角形。唯一能确定的条件是AB=4,AC=8。则ABC的面积不是一个定值。此时需要求出面积的取值范围,也就是它的最小值和最大值。最小值:当三条边无限接近成一条直线,面积接近0。最大值:以AB做底,那么三角形的高最大时,面积最大,即当AC和AB两条边成直角时,面积最大,等于4×8/2=16。因此,0<△ABC面积≤16,答案为D选项。
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