圆锥表面积公式

{"name":"\u5706\u9525\u8868\u9762\u79ef\u516c\u5f0f","type":"\u70ed\u8840\u5267","area":"\u6cd5\u56fd","year":"2021","lang":"\u95fd\u5357\u8bed","play":"\u8fde\u8f7d","type1":"\u70ed\u8840\u5267"}