1 The sum of the three sides of a large triangle is twice that of a small triangle. However, these two triangles are similar, so as long as the sides of the big triangle are twice as large as those of the small triangle, their sides are fixed in proportion, understand?

I don't study computer, and you have mistakes in word writing. For example, cable is not cabie. . .

But I made it even, under the root sign [(5 square+14 square) +8 square ]= 16.88 (approximately equal to).

3 didn't say to calculate the area, but I have given you the radius r ... If you just want to find out the common area, I think it can be described as follows: Take the upper two of the Olympic five-ring flag on the left and the lower one on the left, and then put their three circles together, so that any one passes through the centers of the other two, then you can definitely see the common area:) If you want to calculate the area, you can find me again!

4 [( 1+0.2)/2] square root * Uyghur *hx=( 1/2) square root * Uyghur *2*h

That is, 0.36hx=0.5h and x= 1.38, which will increase by about 38.88%.

5 Use the A side and diagonal D of the rectangle to represent the perimeter. Let the included angle between A and D be T, then the length of side B = under the root sign (square of D-square of A) = d * cost, and then 2*(A+B)= perimeter.

But rectangle also means rectangle, which is more complicated if side A and side B are not perpendicular. Yes, yes, you can consider the rectangular case. If you must do it in a rectangle, please leave me a message. Next time I will take a pen to the Internet cafe. . .

I have worked out the second question. If we want to calculate the area, s =[σr square /6- (root number 3)/4]*3+ (root number 3)/4.

There is no money in my card. I'm going home. I'll talk later!