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Find the Area of a Triangle Given 3 Points Step 1: Plot the points. Step 2: Find the base and height. Step 3: Substitute into area of a triangle formula. Step 4: Evaluate. Step 5: Write the units. Point 1: (-8, -7) Point 2: (4, -7) Point 3: (4, -2) Step 1: Plot the points. Area = 1 2 ⋅base⋅height Area = 1 2 ⋅12⋅5 Step 3: Substitute into area of a triangle formula. Step 2: Find the base and height. Area = 1 2 ⋅60 Step 4: Evaluate. Area =30 units2 5 = height Step 5: Write the units. 12 = base

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