Face diagonal and space diagonal of a cube
Ways to calculate face and space diagonal.
Each side of the cube is x units long.
Use 45-45-90 degree angle ratio
( 1 - 1 - √ 2 ) or Pythagorean theorem to get the face diagonal.
Using Pythagorean theorem twice and you'll get the space diagonal.
Face diagonal and Space diagonal of a rectangular prism.
Same way to figure out the face
diagonal of a rectangle as well as
space diagonal of a rectangular prism.
Use Pythagorean theorem or
30-60-90 degree angle ratio
(1 -√ 3 - 2) to figure out the face
diagonal and Pythagorean theorem
twice to figure out the space diagonal.