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10.3 Area of Parallelograms

10.3 Area of Parallelograms. Geometry. Objectives:. Find the areas of parallelograms. Find the areas of shaded region. Area of Parallelograms. A = bh. h. b. Justification. You can justify the area formulas for parallelograms as follows.

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10.3 Area of Parallelograms

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  1. 10.3 Area of Parallelograms Geometry

  2. Objectives: • Find the areas of parallelograms. • Find the areas of shaded region

  3. Area of Parallelograms A = bh h b

  4. Justification • You can justify the area formulas for parallelograms as follows. • The area of a parallelogram is the area of a rectangle with the same base and height.

  5. Using the Area Find the area of ABCD. • Use AB as the base. • So, b=12 and h=9 • Area=BH=12(9) = 108 square units. 9

  6. Find the area of PQRS. UsePS as the base. The base is extended to measure the heightRU. So, b = 6 and h = 8. EXAMPLE 1 Use a formula to find area SOLUTION Method 1 Method 2 UsePQ as the base. Then the height isQT. So,b =12 andh = 4. Area =bh =12(4) = 48square units

  7. 2. ANSWER 100 units, 510 units2 for Example 1 GUIDED PRACTICE Find the perimeter and area of the polygon.

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