Answer:
45 units²
Explanation:
The formula I learned for finding the area of a triangle is:
½ x b(base) x h(height)
The base for this triangle is 5. The height is 18. You multiply these two numbers and get 90. Then, you multiply 90 by ½. 90 x 1 is 90. 90 divided by two is 45. Your final answer is 45.
Hope it helps!