If ΔACD ≅ ΔAED and AB=8cm,
find perimeter of ΔBDE
更新1:
Please use geometric theorems!
Maths (triangle)?
2016-12-02 10:26 am
1 AC=BC ,AD is the angle bisector of∠BAC , DB┴ AB ,AC┴ BC
If ΔACD ≅ ΔAED and AB=8cm,
find perimeter of ΔBDE
If ΔACD ≅ ΔAED and AB=8cm,
find perimeter of ΔBDE
回答 (1)
2016-12-02 10:38 am
Sol
DE┴AB
AB=8
AC=BC=4√2
BE=AB－AE=8－4√2
DE=BD=(8－4√2)*(√2/2)=4√2－4
△BDE周長=DE+BD+BE=2*(4√2－4)+(8－4√2)= 4√2
DE┴AB
AB=8
AC=BC=4√2
BE=AB－AE=8－4√2
DE=BD=(8－4√2)*(√2/2)=4√2－4
△BDE周長=DE+BD+BE=2*(4√2－4)+(8－4√2)= 4√2
收錄日期: 2021-04-30 21:59:05
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