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2 cards from this section. Quick, good the night before a test.
What formula is used to find the area of a triangle given its vertex coordinates?
Think about how determinant helps in finding areas of shapes.
Identify the coordinates of a point in the plane.
Recall how points are plotted on a coordinate graph.
What is the formula for determining the area of a triangle on a coordinate plane?
Remember to account for the half and absolute value.
Is the area of a triangle always a positive value?
Think about what area represents geometrically.
If a triangle has vertices A(5, 10), B(10, 15), and C(15, 5), calculate the area and explain your method.
Carefully substitute each value and simplify.
Given points A(-4, -2), B(-1, 2), C(3, -4), find the area and reflect on how the coordinates influence the value.
Note how negative coordinates might affect the calculations.
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