小说哥哥拜托饶了我

将女王妃太受宠

因为△ABD△BDC为等腰三角形、AB=√3，
所以AD=√3
BD=√（AD²+AB²）=√6
所以BC=√6
同理DC=2√3
四边形ABCD的周长=AB+AD+BC+DC=4√3+√6
面积=（AB+DC)*AD/2=4.5

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正方形面积是:9/10*9/10=0.81平方米

多:1-0.81=0.19平方米

I know many parters’ ages is less than mine !
I know many mates are younger than I

So I must study hard to study English
So I must study English hard

it is a very good school I think in my hurt
It is a very good school in my heart

My favorite is playing badminton it could become thinner than me , now

I am fond of playing badminton because it could make me thinner

It’s too big It is so big

反穿越之淡若樱颜

首先m≠a, n≠b， 否则m,n二直线是同一条.
二直线均过点（4、5), 带入:
4a + 5b +1 = 0
4m + 5n +1 =0
后者减去前者：4(m - a) + 5(n - b) = 0
(n - b)/(m - a) = -4/5
这是经过点A(a、b)，B(m、n)的直线方程的斜率.
设该直线方程为: y = (-4/5)x + c
该直线过点（4、5): 5 = -16/5 + c
c = 41/5
该直线方程为: y = (-4/5)x + 41/5
变为: 4x + 5y = 41

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