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