(1)如图1,若P点为∠ABC和∠ACB的角平分线的交点,试说明:∠P=90°+1/2∠A.一题多解. class="ikqb_img" src="http://a.hiphotos.baidu.com/zhidao/wh%3D600%2C800/sign=259aded3d739b6004d9b07b1d9601912/9f2f070828381f30d9705099ab014c0
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![(1)如图1,若P点为∠ABC和∠ACB的角平分线的交点,试说明:∠P=90°+1/2∠A.一题多解. class=](/uploads/image/z/6086227-67-7.jpg?t=%EF%BC%881%EF%BC%89%E5%A6%82%E5%9B%BE1%2C%E8%8B%A5P%E7%82%B9%E4%B8%BA%E2%88%A0ABC%E5%92%8C%E2%88%A0ACB%E7%9A%84%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BF%E7%9A%84%E4%BA%A4%E7%82%B9%2C%E8%AF%95%E8%AF%B4%E6%98%8E%3A%E2%88%A0P%3D90%C2%B0%2B1%2F2%E2%88%A0A.%E4%B8%80%E9%A2%98%E5%A4%9A%E8%A7%A3.+++class%3D%22ikqb_img%22+src%3D%22http%3A%2F%2Fa.hiphotos.baidu.com%2Fzhidao%2Fwh%253D600%252C800%2Fsign%3D259aded3d739b6004d9b07b1d9601912%2F9f2f070828381f30d9705099ab014c0)
(1)如图1,若P点为∠ABC和∠ACB的角平分线的交点,试说明:∠P=90°+1/2∠A.一题多解. class="ikqb_img" src="http://a.hiphotos.baidu.com/zhidao/wh%3D600%2C800/sign=259aded3d739b6004d9b07b1d9601912/9f2f070828381f30d9705099ab014c0
(1)如图1,若P点为∠ABC和∠ACB的角平分线的交点,试说明:∠P=90°+1/2∠A.一题多解.
class="ikqb_img" src="http://a.hiphotos.baidu.com/zhidao/wh%3D600%2C800/sign=259aded3d739b6004d9b07b1d9601912/9f2f070828381f30d9705099ab014c086e06f091.jpg" esrc="http://a.hiphotos.baidu.com/zhidao/wh%3D450%2C600/sign=0ad30150372ac65c67506e77cec29e27/9f2f070828381f30d9705099ab014c086e06f091.jpg" />
(1)如图1,若P点为∠ABC和∠ACB的角平分线的交点,试说明:∠P=90°+1/2∠A.一题多解. class="ikqb_img" src="http://a.hiphotos.baidu.com/zhidao/wh%3D600%2C800/sign=259aded3d739b6004d9b07b1d9601912/9f2f070828381f30d9705099ab014c0
(1)因为∠P=180-1/2(∠ABC+∠ACB) ∠ABC+∠ACB=180-∠A 所以∠P=180-90+1/2∠A 即∠P=90+1/2∠A 其实原理就是角p=180°-1/2(角B+角C)=180°-1/2(180°-角A)=90°+1/2角A采纳我吧