弦长拱高求弧长

双群闹5088已知圆弧弦长25米,拱高1.5米,求弧长? -
莘蚁希13270078420 ______[答案] 已知圆弧弦长L=25米,拱高H=1.5米,求弧长C?弧半径为R,弧所对的圆心角为A.R^2=(R-H)^2+(L/2)^2R^2=R^2-2*H*R+H^2+L^2/42*H*R=H^2+L^2/4R=H/2+L^2/(8*H) =1.5/2+25^2/(8*1.5) =52.833米A=2*ARC SIN((L/2)/R =2*ARC S...

双群闹5088已知弦长2米拱高0.3米求弧长? -
莘蚁希13270078420 ______ 设圆弧的半径为r,则1+(r-0.3)^2=r^2,1.09=0.6r,r=109/60,圆心角a=2arcsin(60/109)弧度,弧长=ar=(109/30)arcsin(60/109)≈2.117919373米.

双群闹5088已知弦长6.5米,拱高1米,求弧长 -
莘蚁希13270078420 ______ 已知弦长L=6.5米,拱高H=1米,求弧长C?弧半径为R,弧所对的圆心角为A.R^2=(R-H)^2+(L/2)^2 R^2=R^2-2*R*H+H^2+L^2/42*R*H=H^2+L^2/4 R=H/2+L^2/(8*H) =1/2+6.5^2/(8*1) =5.78125米 A=2*ARC SIN((L/2)/R) =2*ARC SIN((6.5/2)/5.78125) =68.41度 =68.41*PI/180 =1.193996弧度 C=R*A=5.78125*1.193996=6.903米

双群闹5088弦长拱高求弧长 -
莘蚁希13270078420 ______ 已知拱高h及弦长l,求弧长c? 弧半径为r,弧所对的圆心角为a. r=h/2+l*l/(8*h) a=2*arc cos((r-h)/r) c=π*r*a/180

双群闹5088已知拱高弦长求弧长我有4个尺寸帮我求弧长,在知道里面看到公式由于文化底看不懂,请帮我直接算结果.弦长2404拱高664弦长1340拱高669帮我算下弧... -
莘蚁希13270078420 ______[答案] 已知拱高H=664弦长L=2404求弧长C?弧半径为R,弧所对的圆心角为A.R^2=(R-H)^2+(L/2)^2R^2=R^2-2*R*H+H^2+L^2/42*R*H=H^2+L^2/4R=H/2+L^2/(8*H) =664/2+2404^2/(8*664) =1419.95A=2*ARC SIN((L/2)/R) =2*ARC SIN((24...

双群闹5088弦长5米拱高0.3米怎样求弧长 -
莘蚁希13270078420 ______[答案] 弦长L=5米拱高H=0.3米怎样求弧长C? 弧半径为R,弧所对的圆心角为A. R^2=(R-H)^2+(L/2)^2 R^2=R^2-2*R*H+H^2+L^2/4 2*R*H=H^2+L^2/4 R=H/2+L^2/(8*H) =0.3/2+5^2/(8*0.3) =10.567米 A=2*ARC SIN((L/2)/R) =2*ARC SIN((5/2)/10.567) =27.371度...

双群闹5088弦长2.5米,拱高0.2米,请问弧长是多少? -
莘蚁希13270078420 ______[答案] 弦长L=2.5米, 拱高H=0.2米, 请问弧长C是多少?弧半径为R,弧所对的圆心角为A.R^2=(R-H)^2+(L/2)^2R^2=R^2-2*R*H+H^2+L^2/42*R*H=H^2+L^2/4R=H/2+L^2/(8*H) =0.2/2+2.5^2/(8*0.2) =4.00625米A=2*ARC SIN((L/2)/R) =2...

双群闹5088己知弦长40米拱高5米求弧长? -
莘蚁希13270078420 ______ 弦长40米,拱高5米 可得所在圆半径=42.5米 所以弧所对角度约为56.14° 所以弧长=54.14°/360°*π*42.5*2≈40.14米.

双群闹5088请问知道弯钢玻璃弦长,高度,拱高,半径怎么算出弧长?请帮我计算这些尺寸弦长1285,高度1432,拱高43,半径4822计算弧长?列出计算过程. -
莘蚁希13270078420 ______[答案] 弦心距D=半径R-拱高H=4779半弦长L=√(R?-D?)=642.53半弧角α=arcsin(L/R)=7.6574°全弧角=2α弧长=2πR*2α/360°=1288.89

双群闹5088已知弦长3.3米,拱高0.976米,求弧长和面积.最好有公式哦. -
莘蚁希13270078420 ______[答案] 已知弦长L=3.3米,拱高H=0.976米,求弧长C和面积S? 弧半径为R,弧所对的圆心角为A. R^2=(R-H)^2+(L/2)^2 R^2=R^2-2*R*H+H^2+L^2/4 2*R*H=H^2+L^2/4 R=H/2+L^2/(8*H) =0.976/2+3.3^2/(8*0.976) =1.8827米 A=2*ARC SIN((L/2)/R) =2*ARC SIN(...