9.4 Area of a Triangle

9.4 Area of a Triangle - • a b c are measures of the...

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Area of a Triangle Area of a Triangle Sections 9.4 Sections 9.4
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sin sin h C a h a C = = A B C h 1 2 1 sin 2 K bh K ba C = = a
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Area of a Triangle Area of a Triangle The area K of a triangle is This formula is used when the measure of at least one angle is known. 1 sin 2 K bc A = 1 sin 2 K ac B = 1 sin 2 K ab C =
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Heron’s Formula Heron’s Formula Another formula for finding the area of a triangle when the lengths of three sides are known is:
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Unformatted text preview: • a, b, c are measures of the sides of a triangle and s is the semiperimeter of the triangle. ( )( )( ) 2 K s s a s b s c where a b c s =---+ + = Joke Time Joke Time • What is an alligator’s favorite drink? • gatorade • Why can’t Batman go fishing? • Robin eats all the worms!...
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9.4 Area of a Triangle - • a b c are measures of the...

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