Answer: D. 9 sq. units.
Step-by-step explanation:
We know that , the area of a triangle = [tex]\dfrac{1}{2}\times \text{Base x height}}[/tex]
In the given picture , it can be seen that the height of the triangle = 2 units
and base length of triangle = 9 units
Then, the area of a triangle = [tex]\dfrac{1}{2}\times9\times2[/tex]
i.e. Area of a triangle = 9 square units.
Hence, the correct answer is option D. 9 sq. units.
