Fancypants1638 Fancypants1638
  • 05-08-2017
  • Mathematics
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kphung76127
kphung76127 kphung76127
  • 05-08-2017
First, find the area of the entire traingle using the formula bh/2.
18*9/2=81 cm^2
Then subtract the area of the smaller triangle within the larger one (white triangle). It has the same base but a height of only 4.
18*4/2=36 cm^2
81-36=45
Final answer: 45 cm^2

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