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Geometry Section 9.4 Special Right Triangle Formulas

Geometry Section 9.4 Special Right Triangle Formulas. What must we know in order to use the Pythagorean Theorem ?. Two sides of a right triangle.

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Geometry Section 9.4 Special Right Triangle Formulas

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  1. Geometry Section 9.4Special Right Triangle Formulas

  2. What must we know in order to use the Pythagorean Theorem? Two sides of a right triangle.

  3. In section 9.2, we examine two special right triangles. They are special because we only need to know the length of 1 side to find the length of the other two sides.

  4. 45-45-90 or Isosceles Right TriangleIn a 45-45-90 triangle, the hypotenuse is equal to the length of a leg times____.

  5. Examples: Find the length of x and y.

  6. Example: Find the perimeter of a square with diagonals of length 25cm.

  7. In a 30-60-90 triangle, the hypotenuse equals two times the shorter leg and the longer leg equals the shorter leg times .

  8. Examples: Find the length of x and y.

  9. Example: Find the length of the altitudes in an equilateral triangle that has sides of length 20cm.

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