(10+x)^2+40^2=(30+x)^2
x=20, so sin a = 3/5, cos a= 4/5, tan a= 3/4
Angle G = a, so DG=40*4/3
MG = DG-20=160/3-20
MF=MG*3/5=20
(10+x)^2+40^2=(30+x)^2
x=20, so sin a = 3/5, cos a= 4/5, tan a= 3/4
Angle G = a, so DG=40*4/3
MG = DG-20=160/3-20
MF=MG*3/5=20
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对!应该有多种解法。大家继续。这里发一个不常用的解析几何解
-wxcfan123-
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(81 bytes)
()
02/01/2024 postreply
19:03:37
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也可以全部用三角形面积公式来求高
-万斤油-
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(196 bytes)
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02/05/2024 postreply
17:05:55
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