9.4 Special Right Triangles

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9.4 Special Right Triangles

• 45-45-90
• 30-60-90
• Exceedingly Essential for Pre-Cal

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Theorem

• In a Right triangle, if the acute angles are 45
  degrees, then the legs are equal and the
  hypotenuse equals the length of the leg times
  square root of two.

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Solve for x
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Solve for x
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Solve for a
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Solve for a
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Theorem

• In a Right triangle, if the acute angles are
  thirty degree and sixty degree, then the side
  across the hypotenuse is twice the side across
  from the thirty degree angle. The side across
  from the sixty degree equals the sides across
  from the thirty degree angle times square root of
  three.

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Solve for x and r
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Solve for x and r
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Find r and x
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Find r and x
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Find r and x
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• Burn into your memory the 30-60-90
• and 45-45-90 triangles.
• When you do the Unit Circle, you will need it

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Homework

• Page 554 555
• 12 - 26

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Homework

• Page 554 555
• 27 - 34, 37,
• 38, 42, 47 - 49