45°= ___直角=平角=_周角五分之三直角=______.

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45°= _________直角=__________平角=_________周角五分之三直角=__________.
45°= _________直角=__________平角=_________周角五分之三直角=__________.

45°= _________直角=__________平角=_________周角五分之三直角=__________.
45°= ___1/2______直角=______1/4____平角=___1/8______周角
五分之三直角=54°