a geometric figure; an angular projection; a projecting corner:the angles of a building;a viewpoint; standpoint:He looked at the situation from every angle. Not to be confused with: angel– a heavenly creature:Your mother is such an angel. ...
If the smallest angle of a triangle measures 45 degrees, which of the following could be the ratio of the three angles of the triangle? A2:3:3 B3:4:5 C3:5:7 D9:10:17 E9:11:13 F15:17:18 显示答案 登录后才可以添加做题笔记哦,还没有账号? 马上注册 KMF 解析 网友解析 题目...
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook in a circle whose radius is unity, the sine of the arc that measures the angle; in a right-angled triangle, the side opposite the given angle divided by the hypotenuse. SeeTrigonometrical function, underFun...
主要考查的是角度的计算; 从图中可知,\angle 3 = 180\degree-90\degree-\angle1,而且\angle1=25\degree,\angle2=90\degree,所以\angle 3=65\degree;又因为\angle 4=180\degree-\angle3,所以\angle 4;又因为\angle 5=180\degree-\angle4,所以\angle 5=65\degree。反馈...
aThus the three angle bisectors of a triangle intersect at a point D.Since thispoint is the center of the inscribed circle, it is called the incenter of the triangle. 因而三角的三角度bisectors相交在点D.Since thispoint是题写的圈子,它的中心叫三角的incenter。 [translate] ...
$\because $在$\triangle ABC$中,$\angle A:\angle B:\angle C=3:4:5$,$\therefore $设$\angle A=3x$,$\angle B=4x$,$\angle C=5x$,$\because \angle A+\angle B+\angle C=180^{\circ}$,$\therefore 3x+4x+5x=180^{\circ}$,$\therefore x=15^{\circ}$,$\therefore \angle...
Using the Law of Sines to Solve a Triangle 7:02 Law of Cosines | Definition & Equation 8:16 Law of Cosines | Usage, Calculation & Examples 6:37 Ch 11. Explorations in Core Math Algebra 2... Ch 12. Explorations in Core Math Algebra 2...Angle...
16.{\triangle}ABC由\angle A:\angle B:\angle C=3:4:5 A. a:b:c=3:4:5 B. \angle A+\angl
If the ratio of the degree of exterior angle of ∠A,∠ B and / C that are inthe triangle A B C is 5 : 4 : 3, then the ratio of the degree of ∠A,∠ B and ∠ C is(A)5:4:3.(B)3:4:5.(C) 1:2:3. (D) 3:2:1 答案 【解析】【答案】C.【解析】三角形的内角和为...
the sum of angles about a point straight angle平角 2.有关平面图形 equilateral triangle等边三角形 isosceles triangle等腰三角形 right triangle直角三角形 inscribed triangle内接三角形 congruent triangles 全等三角形 similar triangles 相似三角形 triangle inequality 三角不等式 ...