Area of Triangles and Parallelograms

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Presentation transcript:

Area of Triangles and Parallelograms Geometry Area of Triangles and Parallelograms

Goals: Find the area of triangles & parallelograms. Solve problems by combining areas. November 13, 2018

Area The measure of part of a plane surface. Measured in square units. 10 square inches can be written 10 in2. November 13, 2018

You should memorize these formulas. November 13, 2018

Area of a Square s s November 13, 2018

Area of a rectangle W L November 13, 2018

Area of Parallelogram h b November 13, 2018

Area of Parallelogram L b W h November 13, 2018

Area of a Triangle h Why does this work? b November 13, 2018

Area of a Triangle h b Make a congruent triangle. November 13, 2018

Area of a Triangle Rotate it 180. h b November 13, 2018

Area of a Triangle h b Slide them together. November 13, 2018

Area of a Triangle h b This is just a parallelogram. The triangle is 1/ 2 of this. November 13, 2018

Which triangle has the largest area? B C They all have the same area: equal bases and equal heights. November 13, 2018

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