(体验探究题)如图所示,已知一矩形ABCD中,AB=2BC,点E在边DC上,且AE=AB,则∠EBC的度数为_度.
问题描述:
(体验探究题)如图所示,已知一矩形ABCD中,AB=2BC,点E在边DC上,且AE=AB,则∠EBC的度数为______度.
答
在矩形ABCD中,BC=AD,∠D=90°
∵AE=AB,AB=2BC
∴AE=2AD
∴∠DEA=30°
∵AB∥CD
∴∠EAB=∠DEA=30°
又∵AE=AB
∴∠ABE=∠AEB=75°
故∠EBC=90°-∠AEB=15°.
故答案为15.