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## Special Right Triangles

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### Special Right Triangles September 23rd 2010 Section 5.1 ... Triangle Sum Theorem: The angles in a triangle add up to 180o Definition of Right Triangle: ... – PowerPoint PPT presentation

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Title: Special Right Triangles

1
Special Right Triangles
• September 23rd 2010
• Section 5.1 (p. 151 in your book)

2
• Outside x OutsideInside x Inside
• 2) No Radicals in the Denominator
• We must rationalizemultiply the bottom times
itself

3
Do you Remember?...
• Triangle Sum Theorem The angles in a triangle
• Definition of Right Triangle A triangle with an
angle of 90o

4
Right Triangle Theorems
• 45o-45o-90o Triangle Theorem
• Hypotenuse is times as long as each leg

5
45o-45o-90o Triangle Theorem
• If you know one of the legs
• Multiply by to find the hypotenuse
• If you know the hypotenuse
• Divide by to find the legs

6
45-45-90 Practice Problems
• FIND THE VALUE OF X
• A) B)

7
45-45-90 Practice Problems
• FIND THE VALUE OF X
• C) D)

8
Classwork
• p. 153 s 1-6, 11, 12,
• 14, 16, 18