Question

Use the image to answer the question.
An illustration shows a 5 by 9 grid labeled Triangle C. Triangle C is graphed on the grid.
Use decomposition and rearranging to model the area formula of triangle C
. What is the area of triangle C
in square units?(1 point)

21 square units

10.5 units

10.5 cubic units

10.5 square units

Answer 1

Area = 1/2 × base × height. On the grid Triangle C has base 7 units and height 3 units, so area = 1/2 × 7 × 3 = 10.5 square units.

Answer: 10.5 square units.