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September 21, 2014

September 21, 2014

Posted by **Anonymous** on Sunday, December 13, 2009 at 4:36pm.

A)4 15/32 in 2 (sq)

B)8 1/16 in 2 (sq)

C)4 17/32 in 2 (sq)

D)8 17/32 in 2 (sq)

Help!! I am so confused.

- Math -
**MathMate**, Sunday, December 13, 2009 at 7:04pmArea of triangle = (1/2)base*height

here we need to convert the mixed numbers (i.e. sum of number and fractions) to improper fractions (numerator is greater than the denominator) to facilitate the eventual multiplication:

base = 3 5/8 in. = (8*3+5)/8" = 29/8"

height = 2 1/2 in. =(2*2+1)/2" = 5/2"

Now calculate the area

A = (1/2)*(29/8)*(5/2)

=145/32 sq.in.

Convert the improper fraction into a mixed number and make your choice of the answers.

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