2. 外语
  3. In the figure above，PQ is a diameter of circle O，PR=SQ，and △RST is equilateral．If the length of PQ is 2．what is the length of RT

In the figure above，PQ is a diameter of circle O，PR=SQ，and △RST is equilateral．If the length of PQ is 2．what is the length of RT

admin2022-10-18  57
问题
In the figure above，PQ is a diameter of circle O，PR=SQ，and △RST is equilateral．If the length of PQ is 2．what is the length of RT?
选项 A、 
B、 
C、 
D、 
E、 
答案D
解析 Since PR = SQ it follows that RO = OS, so O is the midpoint of RS. Since △RST is equilateral and 0 is the midpoint of , △ROT is a 30°-60°-90° triangle, and since is a radius of the circle with diameter 2, OT= 1. Using the ratios of the sides of a 30°-60°-90° triangle, it follows that RT=.
The correct answer is D.
转载请注明原文地址:https://kaotiyun.com/show/WktO777K
本试题收录于： GMAT QUANTITATIVE题库GMAT分类
0

GMAT QUANTITATIVE

GMAT

相关试题推荐
随机试题
最新回复(0)