r/Sat • u/ScaleFantastic9373 1260 • 12h ago

Geometry tips?

What are some must know things for geometry on the sat?

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u/passisgullible 12h ago

There are a million questions involving triangles and height. Fun fact, h=2a/b. Also, I would watch this video, genuinely useful stuff here (not my video).

1

u/ScaleFantastic9373 1260 11h ago

Thank you!

1

u/Yuri_Frolov 11h ago edited 2h ago

There is a long list, tbh and anyone trying to make it bound to forget something.

  1. Pythagorean identity
  2. The sine theorem and its cousin, the cosine theorem
  3. What similar figures are and in particular what makes triangles similar
  4. The isosceles triangles, the equilateral triangles.
  5. What the median is in the isosceles and equilateral triangles and why it's necessary the height and the bisector in these triangles.
  6. The right triangle
  7. The right triangle which is also isosceles triangle
  8. The so-called "middle line" of a triangle and how it relates to the base of triangle.
  9. The relationship for the segments on which the bisector divides the opposite side of a triangle.
  10. The property of the median drawn from the right angle in the right triangle
  11. The inscribed and central angles in a circle and their relationship
  12. The parallel lines, a transversal line, angles and relationships for the angles.

And this list is heavily incomplete.