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Big Ideas Math Integrated I, 2016 View details

4. Perimeter and Area in the Coordinate Plane

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Exercise 2 Page 410

What must be known to use the formula for the area of a triangle?

A= 12bh and the Ruler Postulate

Practice makes perfect

To calculate the area of a triangle, we can use the following formula. A= 12bh Since b is the base of the triangle and h is the height, we must know those values. Consider the triangle shown.

To calculate the length of the base b and the height of the triangle h, we can use the Ruler Postulate. Once b and h have both been found, we can calculate the area using the above formula.