注目の話題: 結婚したら専業主婦になってほしいと言われた; 仕事の注意ってしたらダメなんでしょうか？; DVされた元彼と3〜4年越しの復縁

science,math and English

No.332　13/11/09 06:05
名無し0 ( 50代 ♂ ) あ+あ-

【Not being able to using a formula precisely.】

Oh!I've forgotten to draw one more straight line.We draw an optional point ⑤ on the upper line from ① to ② on the trapezoid.🐭

The straight line reaches the lower line from ③ to ④ of the trapezoid.The straight line is vertical to both of the upper and lower lines of the trapezoid.🐮

We added the length of the upper and lower lines.Then the sum total multiple by the length of the vertical line.In the next,the value 値 divided by 2.It's the area of the trapezoid.🐷

In short,the process is what is called（上底＋下底）×高さ÷2.In this way,we can find the area of the trapezoid.💡

Though I hate to say and it's shameful of me,I've never understood why the area of the trapezoid was like that until just now.😳

Even if I can't grasp it at all,as long as I chant its formula,I've found its area correctly.I thought as if the formula had been a spell of devil.👿

“As long as I use the spell,I can find the area of the trapezoid!”I've thought like that for a long time.😂