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Decompose area with triangles

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Problem

The following figure is made of 2 triangles.
A quadrilateral with one pair of parallel sides. The base lengths are 7 units and 9 units. The height is 3 units. A dashed line from opposite vertices creates two triangles, labeled A and B. Triangle A has a base of 9 units and a height of 3 units. Triangle B has a base of 7 units and a height of 3 units.
Find the area of each part of the figure and the whole figure.
FigureArea (square units)
Triangle A
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
Triangle B
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
Whole figure
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
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