五边形

.fu{width: 172rpx;height: 204rpx;overflow: hidden;border-radius: 10rpx;clip-path: polygon(0% 0%, 100% 0%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

六边形

clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);