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
41
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
Ourtheoryandpracticeintheareaofsentencinghaveundergoneagradualb
"Freebie"marketingA.Inthelate18905.whiletraveli
A:你知道吗?60多年前,西藏和平解放了。这是西藏发展史上一个具有划时代意义的转折点。//B:IreadfromChinesemodernhist
Ifasked,"Whatarehealthdecisions?",mostofuswouldanswerintermsof
银行对工程设计方案进行分析评估,就是要分析工程设计方案是否可靠。()
联系教学实际,谈谈学习动机与学习效果之间的关系。
招标采购合同规划的内容包括()。A、合同资料整理B、合同数量及种类规划C、合
Shewassoangrythatsherushedoutint
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
梁板类简支受弯混凝土预制构件进场时应进行()检验。A.混凝土强度 B.预
最新回复
(
0
)