关于中心对称的两个图形是全等的

菱形的对角线互相垂直，并且每一条对角线平分一组对角

平行四边形性质定理3平行四边形的对角线互相平分

在前几天某市需轮流停电，正当要停电的时候，女儿高兴的拿着蜡烛在客厅，母亲问干什么这么高兴？女儿兴奋的说：“等一下可以点蜡烛看电视啊！”

孩子第一次放学回来，爸爸问他可喜欢上学。孩子说：“我喜欢上学，更喜欢放学，就是不喜欢中间的上课。”

9个月的小孩抓起一张报纸，放到嘴里嚼着，吃得津津有味。小孩的爸爸看见了，得意地笑着对别人说：“不得了，这孩子将来一定是个大文学家，这么小就会咬文嚼字了。”

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妈妈偷看了儿子的日记。 妈妈：“哎呦！ 你还写诗呢，还春风暖意的，跟谁呀？” 儿子：“你偷看我日记，这是我的隐私。” 妈妈：“隐私？我是妈你还有隐私？有隐私你出生的时候咋不穿个裤衩啊？”