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
39
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://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
Childrenlivingwithsingleparentsencountermanyproblems.Theyaremore【C
Althoughrecentyearshaveseensubstantialreductionsinnoxiouspollutants
Inmyfamily,weweretaughtandshownbyexamplesthatpoliticscanbeano
Canyouchangeyournamejustbecauseyoudon’tlikeit?Andtheanswerapp
某证券交易所为了方便提供证券交易服务,欲开发一证券交易平台,该平台的主要功能如下
A.丙酰CoA B.丙酮 C.丙酮酸 D.丙二酰CoA糖酵解过程的终产物(
某男性工人,曾在某金矿任掘进工10年,2年前调离接尘岗位,调离时体检正常,因近来
程大爷患有糖尿病和高血压20余年,一个月前因糖尿病并发症入院治疗。 程大爷的病
甲公司是一家玩具生产企业,已经经营了十多年,一直以来,致力于跟上小朋友的节奏,生
维持蛋白质分子中α-螺旋和β-折叠的化学键是A.肽键 B.离子键 C.二硫键
最新回复
(
0
)