Who can heip me!1.一个角的余角比它的补角的1/3少20度,求这个角.设这个角是x...
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Whocanheipme!1.一个角的余角比它的补角的1/3少20度,求这个角.设这个角是x...Whocanheipme!1.一个角的余角比它的补角的1/3少20度,求这个角.设这个角是x...Wh
Who can heip me!1.一个角的余角比它的补角的1/3少20度,求这个角.设这个角是x...
Who can heip me!
1.一个角的余角比它的补角的1/3少20度,求这个角.
设这个角是x
...
Who can heip me!1.一个角的余角比它的补角的1/3少20度,求这个角.设这个角是x...
设这个角是x
余角=90-x
补角=180-x
一个角的余角比它的补角的1/3少20度
所以1/3(180-X)-20=90-x
60-x/3-20=90-x
2x/3=90-40
x=75°
(90-x)=1/3(180-x)-20
90-x=60-1/3x-20
50=2/3x
x=75
设这个角是x (度, 以下单位都为度)
90 - x = ( 180 - x )/3 - 20
x = 75
答:这个角是75度
那么余角就是90-X,补角就是180-X,
所以,(90-X)+20=1/3(180-X)
X=75
设这个角为x.
90-x=1/3(180-x)-20
x=75
∴这个角75度
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Who can heip me!1.一个角的余角比它的补角的1/3少20度,求这个角.设这个角是x...
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