叫者量三看在\triangle ABC 中,\angle A=60\degree,b=12,S_{\triangle ABC }=18\sqrt{3} ,则\displa
答:\angle BOC的度数是130\degree 。 本题考查三角形的内角和; 三角形的内角和是180\degree ,将其减去\angle A、\angle 1、\angle 2的度数之和,即可求得\angle OBC和\angle OCB的度数之和等于: 180\degree -70\degree -60\degree =50\degree 将180\degree 减去\angle OBC和\angle OCB的度数之和,...
若在\triangle ABC中,\angle A = {60\degree},b = 1,{S_{\triangle ABC}} = \sqrt 3 ,则 \frac{{a + b + c}}{{\sin A + \sin B + \sin C}} =___。相关知识点: 试题来源: 解析 \frac23\sqrt{39} 本题主要考查应用正余弦定理解三角形。 S_{\triangle ABC}=\frac12bc\sin...
An angle measures 60 degrees. If it is divided by 3, what is the result? A. 20 degrees B. 30 degrees C. 40 degrees D. 50 degrees 相关知识点: 试题来源: 解析 A。本题考查角度的除法运算。60 度除以 3,即 60 ÷ 3 = 20 度。
19. Cut the ( ) at a 45 degree angle so that the roses can take in more water. A. flowers B. stems C. fruits D. buds 相关知识点: 试题来源: 解析 A选项flowers意思是花朵;B选项stems意思是茎部;C选项fruits意思是果实;D选项buds意思是花蕾,即尚未开放的花朵。根据上述分析我们知道让玫瑰花...
and a right angle is 90 of that 360 degrees. It is one-quarter of the full circle, which gives a 90-degree angle its L shape. A 90-degree angle can be rotated in any direction and still have an internal angle of 90 degrees. If a triangle has a 90-degree angle, it is known as...
已领离如图,在\triangle{ABC} 中,P点是\angle{BCE}和\angle{CBF}的角平分线的交点,若\angle{A} =60\degree,则\an
35-degree angle,要加连字符。数词加名词,中间加连字符号,这种形式相当于一个复合形容词,常作名词的定语,这种情况下,名词始终用单数形式,如:She tried to climb a five-meter-high fence.她试图爬上一个五米高的围墙。He is a five-year-old boy.他是一个五岁大的男孩。This is a one...
使用小三角形进行角度追逐:使用110∘下方和左侧的线条可以发现左下角小三角形中最右边的角度为180−110=70∘.然后使用小左下角三角形找到该三角形中的剩余角度为180−70−40=70∘.使用全等垂直角度可以发现包含A的最小三角形中的下角也是70∘.接下来,使用线段AB来查找包含A的最小三角形中的另一个...
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