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# Use Pythagorean theorem to find area of an isosceles triangle

Sal uses the Pythagorean theorem to find area of an isosceles triangle.

## Want to join the conversation?

• Can you tell me what is the use of Pythagorean in our daily
life?
• Here is an answer from Hadriel Ramos (check the comments!) :Actually it is one of the most fundamental theorems in basic geometry.

Just imagine a tall post (10 meters High) and you are standing 20 meters away. And you wanted to tie a rope to the high point of the post to the ground from which you are standing. You use the Pythagorean Theorem.
• How if the value of the base is missing
• If the value of the base is missing , than you dont use pythagorean theroem for it.
• Can you use the Pythagorean Theorem to solve for any triangle? If so, can you please add an example for a scalene triangle.
• You can work out the area for triangles which are made up with right triangles, like the triangle that Sal uses in this video.
Hope this helps.
• Is it possible to create a video for using the Pythagorean theorem to find the perimeter?
• m
2 = x + 91 how do i find the solution to this eqation with an isosyles triangle that has a degree of 50
• why are we learning this?
• Every skill that we learn, no matter how insignificant it may seem, will be used someday. Most, if not all, of the lessons here on Khan Academy can help with at least one job where it would be vital to have an understanding of it.
• Is it just me, or is Pythagorean Theorem ALMOST as fun as Minecraft (or Minekahn, for that matter) and fractions?
• i cant describe my loathing for the pethagriam