急要 請在30分鐘內幫我手=.=

a.
the angle between the hour-hand and 12:00正>>>

= 360/12x 25/60 + 90 =102.5 度

the angle between the minute-hand and 12:00正>>>

= 25/60x360 =150 度

so
the acute angle between the hour-hand and the minute-hand at 3:25
= 150-102.5 = 47.5 度

reflex angle :優角 即大於平角小於周角的角
b.
the angle between the hour-hand and 12:00正>>>
= 360/12x 25/60 + 90 =102.5 度

the reflex angle between the minute-hand and 12:00正>>>
=55/60x360=330度

so
the reflex angle between the hour-hand and the minute-hand at 3: 55
=330-102.5 =227.5 度








Not really sure but I hope it can help you

2008-10-26 00:10:53 補充：
5該哂 y6972593

b.what is the reflex angle between the hour-hand and the minute-hand at 3: 55
> = 360/12x 25/60 + 90 =102.5 度
>>>>>>>> = 360/12x 55/60 + 90 =117.5 度
> =330-102.5 =227.5 度
>>>>>>>>> =330-117.5 =212.5 度


5記得左轉25做55添@w@

2008-10-26 00:12:09 補充：
5該哂 " y6972593"

b.what is the reflex angle between the hour-hand and the minute-hand at 3: 55
> = 360/12x 25/60 + 90 =102.5 度

>>>>>>>> = 360/12x 55/60 + 90 =117.5 度
> =330-102.5 =227.5 度
>>>>>>>>> =330-117.5 =212.5 度




5記得左轉25做55添@w@

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b.what is the reflex angle between the hour-hand and the minute-hand at 3: 55
> = 360/12x 25/60 + 90 =102.5 度
>>>>>>>> = 360/12x 55/60 + 90 =117.5 度
> =330-102.5 =227.5 度
>>>>>>>>> =330-117.5 =212.5 度

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