注目の話題: 仕事が長続きしない原因; この場合の気遣いが分からない…; 友達いなくなった

science,math and English

No.331　13/11/09 05:23
名無し0 ( 50代 ♂ ) あ+あ-

【Not being able to use a formula precisely.】

As a result,we can create a quadrangle 四角形,④②③①.It's also a parallelogram.Area of the triangle,①②③ is half of the parallelogram,④②③①.△🐯

Therefore,when calculating an area of a triangle,the area of the quadrangle divided by 2.△💡

In the next,I'm going to express on a trapezoid 台形．At first,we draw from an optional point ① to other one ②.It's a straight line.🐵

Then,we draw an optional point of ③ to ④.It's also other straight line.The two lines are parallel each other,but the length of the straight line ①② is shorter than that of the other straight line,③④.🐵

When connecting the four optional line,from ① to ④ in turn,it's a trapezoid.Then we draw a diagonal line 対角線 from ③ to ②.🐰

The area of the trapezoid,①②③④ is equal to the sum total of those of the two triangles,①②③,and ②③④.🐸

Therefore,when finding the area of the trapezoid,the next formula is organized.💡

At first,we add the length of the upper line ①② to that of the lower line ③④.💡

To be continued.