Question

∠b＝35°,bc＝10,bc上的高ad＝7,∠b＝35°,b撇c撇＝5,b撇c撇上的高a撇d撇＝

Answer 1

相似因为,∠B=∠B',角ADB=角A‘D'B',所以△ADB∽△A'D'B'所以BD/B'D'=AD/A'D'=AB/A'B'=2所以DC/D'C'=2又AD/A'D'=2,角ADC=角A'D'C'所以△ADC∽△A'D'C'所以AC/A'C'=AD/A'D'=2又AB/A'B'=2,BC/B'C'=2,所以△ABC∽△A'B'C