三角形的重心是[]A．三角形条角平分线的交点B．三角形三条中线的交点C．三角形三条边的垂直平分线的交点D．三角形三条高的交点-八年级数学

更多内容推荐

• 如图，△ABC中，∠A=70°，H为△ABC的内心，则∠BHC=（）。-九年级数学
• Women are friendly. But men are more competitive. Why? Researchers have found it's all down to
• 三角形三边上的垂直平分线相交于一点，这一点在[]A、三角形内B、三角形外C、角形一边上D、三角形内或三角形外或三角形一边上-九年级数学
• 如图，G是△ABC的重心，AG⊥GC，AC=4，则BG的长为（）．-七年级数学
• Several days ago, a Beijing-based IT company fired about 400 people overnight. No one had expected
• The cultures of the East and the West really distinguish each other a lot. This is because the cultu
• Rae and Bruce Hostetler not only work very hard，they also relax just as well.Numerous vacations help
• Travel UnaccompaniedNow many young people are traveling around the world on their own, not because t
• The elderly Chinese man in the small booth (售票口) behind the thick glass shook his head. I didn'
• Willi around 100 students scheduled to be in that 9 am Monday morning lecture, it is no surprise tha
• 一只猫观察到一老鼠洞的全部三个出口，它们不在一条直线上，这只猫应蹲在处（），才能最省力地顾及到三个洞口。-九年级数学
• A newspaper reporter’s job can be very interesting．He meets all types of people and lives quite a bu
• Some people in Manchester, Britain, will soon be paying for goods and services with so-called “smart
• The fact that blind people can see things using other parts of their bodies apart from their eyes ma
• If you want to stand out，there is no alternative but hard work.Once a boy in____clothes full of patc
• Moving to a new neighborhood，town，state，or even country can be a pretty scary experience.All you kno
• Let's say you want to hit the gym more regularly this year. How do you make that happen? Consid
• (Q =" Question;" A = Answer)Situation IQ: If someone sits right next to me in an empty mov
• Local businessmen are increasingly facing competition from online retailers. Larry Pollock, owner of
• 等腰三角形底边上的高与一腰的垂直平分线的交点是[]A.重心B.垂心C.外心D.无法确定-九年级数学
• “Mum, can I invite my classmate Brett over to stay tomorrow night, please? It’s Friday, and we don’t
• 小题1:Why is June 6, 1990 a special day for Mommy?A．Her dream of being a mother came true.B．She found
• From Japan to Indonesia, a certain kind of pop culture is very hot. But it doesn’t come from Hollywo
• Millions of kids in the United States attend some kind of camp each summer. Some go to sleep-away ca
• I grew up with a fat dad—450 pounds at his heaviest.Every week he would try a new diet，and my family
• When you make a mistake，big or small，cherish it as it’s the most precious thing in the world.Most of
• A daughter thought life was unpromising(无前途的) to her and complained to her father about it. She did
• Four out of ten parents in the UK spend between ￡100 and ￡500 on their children’s birthday parties,
• 三角形外接圆的圆心是[]A.三个内角平分线的交点B.三条边的中线的交点C.三条边垂直平分线的交点D.三边的三条高的交点-九年级数学
• 已知点O为△ABC的外心，若∠A=80°，则∠BOC的度数为（）。-九年级数学
• 有下列结论：（1）平分弦的直径垂直于弦（2）圆周角的度数等于圆心角的一半（3）等弧所对的圆周角相等（4）经过三点一定可以作一个圆（5）三角形的外心到三边的距离相等（6）等腰梯形一定-九年级数学
• Is it ever a good idea admitting a teenager to carry a credit card?My kids watch closely as I swipe
• For most city people, the elevator is an unremarkable machine that inspires none of the enthusiasm o
• Hacking our senses to boost learning powerSome schools are pumping music, noises and pleasant smells
• On this Christmas Day I had the wonderful opportunity to see the true spirit of Christmas.My big fam
• Some people can stay up all night and still get work done the next day.I'm not one of them.Afte
• What is Home stay? Literally it is a home for you to stay at when you are not at home. To be specifi
• IMAGINE that you are in school, giving a speech to your class. Now think what it feels like when sta
• A group of graduates got together to visit their old university professor.The conversation soon turn
• Mother used to ask me what the most important part of the body is.Through the years I would ____a gu
• The Couch Surfing network is an online community stretching across the globe with over one and a hal
• We all know that the normal human daily cycle of activity is of some 7-8 hours' sleep alternati
• You’ve flown halfway around the world; you’ve sniffed out this place that nobody in Falongland or Th
• 在Rt△ABC中，∠C=90°，AC=6cm，BC=8cm，则它的外心与顶点C的距离为[]A.5cmB.6cmC.7cmD.8cm-九年级数学
• 一个三角形的外心在其内部，则这个三角形是[]A.任意三角形B.锐角三角形C.直角三角形D.钝角三角形-九年级数学
• 已知△ABC的内切圆O与各边相切于D、E、F，那么点O是△DEF的[]A.三条中线交点B.三条高的交点C.三条角平分线交点D.三条边的垂直平分线的交点-九年级数学
• What could be cuter than your puppy giving his doggy friend a kiss on the nose? Nothing，really．But i
• Americans plan parties for many reasons. As in other cultures, many Americans attend parties for wed
• 阅读短文，掌握其大意，然后从36-55题中选出能填入空白处的最佳答案，使短文句意通顺，符合逻辑，并把答案填在在答题卡内。Once there were two men, who lived in th
• Some years ago I was offered a writing assignment that would require three months of travel through