Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Trending News

Promoted
ribcarbean
ribcarbean asked in Science & MathematicsMathematics · 4 months ago

what is 2d space and 3d space?

let's say you take a 3 x 5 rectangle and you divide it down the middle.  then the area is half of 15.  but if you also divide instead diagonally you get two triangles also half of 15.  how come the areas are equal?  is area and volume and even 1d linear line some kind of quantity?

2 Answers

Relevance
  • jeffdanielk
    Lv 4
    4 months ago

    You made two 3 by 2.5 rectangles. Each has an area of (3)(2.5) = 7.5 

    Then you made two right triangles with sides 3 and 5. Each has an area of 1/2 base time height. A = (1/2)(3)(5) = 7.5 

  • nyphdinmd
    Lv 7
    4 months ago

    Rectangle area A = wL  w= width,  L = length

    Area dividing length by 2 --> A_l = 1/w*L

    area dividing width by 2 --> A_w = 1/2 w*L

    area dividing along diagonal

      Area of one rt. triangle = A_t = 1/2 b*h   let h = w, then b = L ---> A_t = 1/2 w*L

Still have questions? Get your answers by asking now.