1 Serek is showing how to model the area formula of a triangle
1) Original triangle
2) Create a congruent triangle.
Rotate it then join it to the original
triangle, forming a parallelogram.
3) Decompose the parallelogram
into a right triangle and a trapezoid.
4) Rearrange the triangle and
trapezoid to form a rectangle.
Which of these steps will identify the area
of the original triangle?
A Find the total area of the trapezoid
B Find half the area of the rectangle
C Find half the area of the trapezoid
D Find the area of the shaded triangle
5.80