题目信息
If each side of ΔACD above has length 3 and if AB has length 1, what is the area of region BCDE ?
A:
B:
C:
D:
E:
参考答案及共享解析
共享解析来源为网络权威资源、GMAT高分考生等； 如有疑问，欢迎在评论区提问与讨论
本题耗时：
已选答案：
正确答案：
B:
Geometry Triangles; Area
The area of region BCDE is the area of ΔACD minus the area of ΔABE. Since ΔACD is equilateral, its area is
. ΔABE is a 30–60–90 triangle with side lengths 1, 
, and 2 and area 
. Thus, the area of region BCDE is 
− 
= 
.
The correct answer is B.
The area of region BCDE is the area of ΔACD minus the area of ΔABE. Since ΔACD is equilateral, its area is
. ΔABE is a 30–60–90 triangle with side lengths 1, , and 2 and area . Thus, the area of region BCDE is − = .The correct answer is B.
加入收藏
在线答疑
题目来源
