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9.4 Special Right Triangles

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

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.

Solve for x

Solve for x

Solve for a

Solve for a

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.

Solve for x and r

Solve for x and r

Find r and x

Find r and x

Find r and x

- Burn into your memory the 30-60-90
- and 45-45-90 triangles.
- When you do the Unit Circle, you will need it

Homework

- Page 554 555
- 12 - 26

Homework

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

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