Question 262393: Find the area of a triangle whose vertices have coordinates (0,9), (0,-4), and (5,-4).
Answer by Edwin McCravy(20055)   (Show Source):
You can put this solution on YOUR website! Find the area of a triangle whose vertices have coordinates (0,9), (0,-4), and (5,-4).
Let's draw the triangle
The base of that right triangle is from (0,-4) to (5,-4). Using
the x-axis as a measuring stick, the base is 5 units long.
The height of that right triangle is from (0,-4) to (0,9). Using
the y-axis as a measuring stick, the height is 13 units long.
Use the formula for the area of a triangle:
 
Edwin
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