in triangle abc a=12 b=16 and sinB=2/3 what is the measure of angle A in degrees还有：the equation x^2+2ix-4=0 has as its toota根号下5-1,-根号下5-1b根号下5-i,根号下5+ic根号下3-i,根号下5+id根号下3-i,根号下3+ie根号下3-1,-

Given in the△ABC,a,b,c are three sides of the triangle,and 3a=2b+1c,then∠A is（　　） （英汉 英语翻译The legs of right triangle ABC have lengths 3 and 4.What is the perimeter of a right triangle with each side twice the length of its corresponding side in triangle ABC? A circle inside a triangle?Triangle ABC has AB = 240,BC = 270,AC = 330.What is the area of the largest possible circle that fits entirely within this triangle?Sorry about the English,I can't type Chinese in this computer.Please help me? GMAT data sufficiencyIs the perimeter of triangle abc greater than 20?A.bc-ac=10B.the area of triangle abc is 20 请翻译 As shown in the following diagram,Triangle ABC is a regular triangle,and Point D is the midpoint on Side AB.DE is perpendicular to BC,and the area of Triangle BDE is five square centimeters.Now please calculate the area of Triangle ABC. 先在此谢过各路好汉了!1---In triangle ABC,AB=AC=2,whch of the following culd be the area of triangle ABC?Indicate all possible areas.A) 0.5 B) 1.0 C) 1.5 D)2.0 E) 2.5 F)3.02---Each integer from 1 to 50 whose units digit is a 3 is written on in triangle ABC,AB=AC=2.WHICH of the following could be the area of triangle ABC?Indicate all possible areas.（多选题）A、0.5 ； B、1 ； C、1.5；D、2； E、2.5 ；F、3（不要死算哈） 请翻译As shown in the following diagram,there is a triangle ABC.Now we extend the length of Side AB to Point D,which makes BD=ab; while we estend the length of Side AC to point E,which makes CE=2AC;THUS we can get a bigger triangle ADE.Now please “The sum of the measures in degrees of the angles of a triangle is 180.The sum of the measures in degrees of the angles of a triangle is 180.= =偶被搞晕了. in triangle abc a=12 b=16 and sinB=2/3 what is the measure of angle A in degrees还有：the equation x^2+2ix-4=0 has as its toota根号下5-1,-根号下5-1b根号下5-i,根号下5+ic根号下3-i,根号下5+id根号下3-i,根号下3+ie根号下3-1,- There are 10 pins placed in a triangle in a blowing game. triangle triangle triangle 英语翻译triangle in prism :triangle in cylinder segment =line segment in rectangle :line segment in parabolic segment.segment这个词把握不准,这个等式怎么翻译? A triangle has A = 60o,b = 20,and c = 30.What is the measure of C in degrees to one decimal plac2,In solving ABC triangles,the uppercase letters or Greek letters usually indicate the ________ 这是两道题,他们之间没有什么联系,实在不 英语翻译The coordinates of the three points A,B,C on the plane are (-5,-5),(-2,-1) and (-1,-2),respectively,the triangle ABC is ( )A、a right triangle B、an isosceles triangle C、an equilateral triangle D、an obtuse triangle 一道数学题.死活弄不出来~Let A(a),B(b),and C(c) be three points in the plane (here a,b,c are complex num-bers).Let G be the gravity center of the triangle ABC.Show that the complexnumber corresponding to G is g =(a + b + c)/3.Hint.Denote by