求翻译，英语和数学之间的，只用改错，不用重翻，今天就要，急！！！！！

Question

今天,我要给大家讲的题目是——三角形的内角和不一定是180度
例如，在圆中。
首先,我们先要知道球的表面积是4πr²
那么，作一个半径为1的球
设圆上2条线的夹角为A，易知当A=2π时，两条线围成的面积为4π，且两线所围成的面积与A成正比，所以两线所围成的面积=2A

所以，如图。延长三角形ABC的三边，使其交于圆的另一边，记做A’,B’,C’
所以 ，

又因为三角形ABC面积不为0，所以A+B+C>π，即A+B+C>180度
My presentation is the sum of the three interior angles of a triangle may not equal to 180 degrees such as a triangle on a ball.
First of all, we should know that the superficial area of a ball is equal to 4π times the radius of a ball squared.
Then, let’s make a ball whose radius is 1 and define an angle A which is between two segments on the ball.
It is easy to know that if A’s measure is equal to 2π, the superficial area between two segments is equal to 4πand the A’s measure has a direct proportion with the superficial area between two segments.
So, the superficial area between two segments equals 2 times A.
And, look at this picture. There is a triangle ABC and lengthen three segments, AB, AC, BC which meet at another side on the ball. We call that A’ B’ C’. So
And

So, add this three equations, we can see that and we can know .Because the superficial area of a triangle isn’t 0, so, A plus B plus C is greater than 180 degrees.

其实中间还有证明过程的插图，没法直接复制，所以就这些了…………
各种翻译器出来的不要，宁可看分没了…………
希望达人帮忙挑错，今天就要！！！
So（有式子）
And（有式子）
So, add this…………

we can see that （有式子） and we can know（有式子）

由于式子是插图，不用管的说

Answer 1

我的报告是三者的总和内部的角度对三角形不一定等于180度,如三角形一个球。
首先,我们应该知道表面的面积等于4π次球球的半径的平方。
那么,让我们做一个球的半径为1,并定义了一种角度,介于两段一个控球在脚。
很容易知道如果一个尺度是公平的,表面之间的地区2π两段是公平的措施4πand有着直接的比例
此为准确翻译……………………
Today, I want to give you a lecture on the topic of -- of the triangle is not necessarily falling 180 degrees
For example, in the round.
First, we need to know the ball surface area is 4 PI r 2
So, as a radius of 1 ball
Set on the circle 2nd line Angle of A, easy to know when A = 2 PI, two lines surrounded the area of 4 PI, and two lines have surrounded the area and A direct proportion, so two lines have surrounded the area = 2A

So, as shown in the diagram. Extended triangle ABC trilateral, make its handed over to the other side, remember round A 'B' do, C '
So,

And because the triangle ABC area of not 0, so A + B + C > PI, namely A + B + C > 180 degrees
此为中译英

Answer 2

(1 ) may not equal 180 degrees 或 may not be equal to 180 degrees.
.

(15) so, A plus B plus C are greater than 180 degrees.本回答被提问者采纳

Answer 3

很好，没错。

Answer 4

太好了！