Final answer:
The area of the triangle with vertices at (-3, 5), (-3, 7), and (4, 7) is calculated using the formula for the area of a triangle (1/2 × base × height), yielding 7 square units.
Step-by-step explanation:
The question involves calculating the area of a triangle on a coordinate plane with vertices at (-3, 5), (-3, 7), and (4, 7). To find the area of a triangle, you can use the formula: Area = 1/2 × base × height. In this case, the triangle's base and height can be easily determined from the coordinates given because the triangle's vertices form a right angle.
The base is the horizontal distance between the points (-3, 7) and (4, 7), which is 7 units (since both have the same y-coordinate). The height is the vertical distance between the points (-3, 5) and (-3, 7), which is 2 units (since both have the same x-coordinate).
Now, plug the base and height into the area formula:
Area = 1/2 × base × height
Area = 1/2 × 7 × 2
Area = 1/2 × 14
Area = 7 square units
Therefore, the area of the triangle is 7 square units.