360° 45° 110° 90° 150° 60°100° 15° 130° 180° 160° 91°
锐角:________ 直角:________ 钝角:________平角:________周角:________.
45°60°15° 90° 110°150°100°130°160°91° 180° 360°
分析:依据角的概念及分类就可以作答.小于90°的角是锐角,等于90°的角是直角,大于90°且小于180°的角是钝角,等于180°的角是平角,等于360°的角是周角.
解答:依据角的概念及分类,答题如下;
锐角:45° 60° 15° 直角:90° 钝角:110° 150° 100° 130° 160° 91°平角:180°周角:360°
故答案为:45° 60° 15°; 90°;110° 150° 100° 130° 160° 91°;180°;360°.
点评:此题主要考查角的概念及分类.