(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="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