首页
登录
职称英语
[img]2022m10s/ct_ve01203002j_egreqjs_0183_202211[/img]Which of the following st
[img]2022m10s/ct_ve01203002j_egreqjs_0183_202211[/img]Which of the following st
游客
2024-01-12
55
管理
问题
Which of the following statements about triangle PQR shown in the xy-plane are true?
选项
A、PQR is a right triangle.
B、The area of PQR is 15/2.
C、PQR is an isosceles triangle.
答案
A,B
解析
选项A: 方法1:计算QR所在直线和PR所在直线的斜率,利用两条直线垂直斜率为-1的性质可知,直线QR和PR垂直,A正确;
方法2:利用两点间距离公式,分别计算出
可知三边正好满足勾股定理:
则PQR是直角三角形,A正确;
选项B: 三角形面积为:
B正确;
选项C:算出三边长后可知△PQR中没有相等的两条边,C错误。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3355212.html
相关试题推荐
Whichofthefollowingisequaltothecubeofanon-integer?A、-64B、-1C、8D、9
Whichofthefollowingistheclosestapproximationof[img]2011q3/ct_egmatqj_eg
Thefollowingdatasufficiencyproblemsconsistofaquestionandtwostatements
Thefollowingdatasufficiencyproblemsconsistofaquestionandtwostatements
Ifrisnegativeandsispositive,whichofthefollowingmustbenegative?A、|r
Ifxandyareoddintegers,whichofthefollowingmustalwaysbeanon-integer
Thefollowingdatasufficiencyproblemsconsistofaquestionandtwostatements
Thefollowingdatasufficiencyproblemsconsistofaquestionandtwostatements
Thefollowingdatasufficiencyproblemsconsistofaquestionandtwostatements
Whichofthefollowingcouldbetheequationoflinelinthefigureabove?[img]
随机试题
Imagineonedayreadingthatyouhadbeenasubjectinariskyscienceexper
Theaudience_____excitedonseeing_____favoritestarglideontothestage.(2016
[originaltext]W:You’renotgoingtomakethecall,areyou?Aren’tyougoingt
[originaltext]W:Hi,Robert.ThisisJen.M:Hi,Jen.What’sup?W:(15)I’mgoin
[originaltext]W:Ihaven’tseenyouhereforacoupleofweeks.Haveyoustoppe
小学品德《读懂爸爸妈妈的心》主要教学过程及板书设计 教学过程 环节一:新课导入 运用歌曲的方式导入,播放《我爱我的家》歌曲的视频,让学生跟着录音一起欢唱。
2010年7月1日,大唐建筑公司与甲公司签订一项固定造价建造合同,承建甲公司的一
A.衣原体 B.铜绿假单胞菌 C.B组链球菌 D.葡萄球菌 E.大肠杆菌
左侧腹股沟滑动性疝,下列哪项是正确的A.属可复性疝 B.疝内容物没有小肠 C
尖牙窝上附着的肌肉是A.提口角肌 B.提上唇肌 C.提上唇鼻翼肌 D.颧大
最新回复
(
0
)