How to Find the Area of a Parallelogram Step 1, Plan: To find the area of a parallelogram, use the formula A = bh.

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Presentation transcript:

How to Find the Area of a Parallelogram Step 1, Plan: To find the area of a parallelogram, use the formula A = bh

How to find the Area of a Parallelogram Step 2, Given: Determine the base and the height base height The base can be any side of the parallelogram that is perpendicular to the height. The height is the length of the altitude, a line segment perpendicular to the base with the endpoints on the base and the side opposite the base.

How to find the Area of a Parallelogram Step 3, Plug/Solve: Find the product of the base and height. Step 4, Write: Write a statement by rewriting the question as a statement using the answer.

How to find the Area of a Parallelogram EXAMPLE: 7 ft 5 ft 8 ft Step 1: Step 2: Step 3: Step 4:

How to find the Area of a Triangle Step 1, Plan: Find the area of a triangle, use the formula A = ½ bh

How to find the Area of a Triangle Step 2, Given: Determine the base and the height base height The base is the side of the that is perpendicular to the height. The height is the length of the altitude, a line segment perpendicular to the base with the endpoints on the base and the side opposite the base.

How to find the Area of a Triangle Step 3, Plug/Solve: Take half of the product of the base and height. Step 4, Write: Write a statement by rewriting the question as a statement using the answer.

How to find the Area of a Triangle EXAMPLE: Step 1: Step 2: Step 3: Step 4: 8 m 12 m

How to find the Area of a Trapezoid Step 1, Plan: Find the area of a trapezoid, use the formula A = ½ h(b + b)

How to find the Area of a Trapezoid Step 2, Given: Determine the bases and the height base height The bases are the sides that are parallel. The height is the length of the altitude, a line segment perpendicular to the bases. base

How to find the Area of a Trapezoid Step 3, Plug/Solve: Take half of the product of the height and sum of the bases. Step 4, Write: Write a statement by rewriting the question as a statement using the answer.

How to find the Area of a Trapezoid EXAMPLE: Step 1: Step 2: Step 3: Step 4: 3 yd 4 yd 7 yd 6 yd

Real Life Example You are buying grass seed for the lawn surrounding three sides of an office building. If one bag covers 2,000 sq. ft., how many bags should you buy? 100 ft 50 ft 140 ft 62 ft 80 ft

HOMEWORK From page 317, complete #6-20 (even)