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Honors Geometry Section 5.5 Special Right Triangle Formulas.

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Presentation on theme: "Honors Geometry Section 5.5 Special Right Triangle Formulas."— Presentation transcript:

1 Honors Geometry Section 5.5 Special Right Triangle Formulas

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

3 This note sheet examines 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 Triangle In 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 In a 30-60-90 triangle, the hypotenuse equals two times the shorter leg and the longer leg equals the shorter leg times.

7 Examples: Find the length of x and y.

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

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