triangle top: right triangle bottom: equilateral triangle tri·an·gle (trī′ăng′gəl) n. 1. a.The plane figure formed by connecting three points not in a straight line by straight line segments; a three-sided polygon. b.Something shaped like such a figure:a triangle of land. ...
A triangle XY Z is said to be inscribed in a triangle ABC if X lies on BC, Y lies on CA, and Z lies on AB. In mathematics literature there are not many references about the inscribed triangles in a triangle. Personally I have found two documents [1], [2] in which equilateral ...
double a, b, c, d; int icase = 1; while(~scanf("%lf%lf%lf%lf", &a, &b, &c, &d)) { if(dcmp(a)==0 && dcmp(b)==0 && dcmp(c)==0 && dcmp(d)==0) { break; } double L = a+b+c; double cosA = (b*b+c*c-a*a)/(2*b*c); double S = 0.5*b*c*(sqrt(...
Area in Triangle /// oj10229 题目大意: 给出三角形的三个顶点 再给一条绳(绳长不超过三角形周长) 求绳子在三角形中能围出的最大面积 题解链接http://blog.sina.com.cn/s/blog_6a46cc3f0100tujn.html 多边形和圆 周长相同时 圆的面积更大 而当绳长超过三角形的内接圆时 沿着边放 对应三角的三个...
Atriangle, by definition, isa shape that has three sides. When we think of a triangle, we can associate it with road signs, pyramids, flags, and even musical instruments! In geometric terms, a triangle consists of a set of threestraight linesorsides, threeinterioranglesthat are formed by ...
doubleqpow(doublea,llb) { doubleans=1; while(b) { if(b&1)ans=ans*a; b>>=1; a=a*a; } returnans; } intmain() { doublea,b,c,sum; llT=0; while(cin>>a>>b>>c>>sum){ if(!a&&!b&&!c&&!sum)break; doublepi=acos(-1); ...
Example: Find the area of this triangle: First of all we must decide what we know. We know angle C = 25º, and sides a = 7 and b = 10. So let's get going: Area =(½)ab sin C Put in the values we know:½ × 7 × 10 × sin(25º) Do some calculator work:35 ...
What is the height of the triangle? A. 3 meters B. 6 meters C. 8 meters D. 12 meters 相关知识点: 试题来源: 解析 B。三角形的面积公式是:面积 = (底×高)÷ 2。已知面积是 12 平方米,底是 4 米,那么高 = 面积×2÷底 = 12×2÷4 = 6 米,选项 B 正确。选项 A 计算错误;选项 C...
In a trapezoid ABCD,2AE=DE,CE⊥AD,CE is a bisector to∠BCD,then the ratio of the area of a quadrilateral ABCE to that of a triangle CDE is ___.(英汉小词典trapezoid:梯形;bisector:平分线;ratio:比值;quadrilateral:四边形) 梯形ABCD中,2AE=DE,CE⊥AD,CE平分∠BCD,则四边形ABCE与△CDE的...
(b&1) ans=ans*a; b>>=1; a=a*a; } return ans; } int main() { double a,b,c,sum; ll T=0; while(cin>>a>>b>>c>>sum){ if(!a&&!b&&!c&&!sum) break; double pi=acos(-1); double l=a+b+c; double ja=(b*b+c*c-a*a)/(2*b*c); double s=0.5*b*c*sqrt(1-...