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**Honors Geometry Section 5.2 Areas of Triangles and Quadrilaterals**

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**You can see that the area of parallelogram ABCD is equal to the area of rectangle EBCF.**

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For a parallelogram with base b and height h, the area is given by the formula: A parallelogram = ______ Note that the height is the length of the segment perpendicular to the base from a point on the opposite side which is called the altitude of the parallelogram.

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**Any triangle is half of a parallelogram**

Any triangle is half of a parallelogram. For a triangle with base b and height h, the area is given by the formula: A triangle = ________ The height is the length of the ____________ to the base

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**Example: Find the area of to the nearest 1000th.**

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**Example: A triangle has an area of 56 and a base of 10. Find its height.**

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An altitude of a trapezoid is a segment perpendicular to the two bases with an endpoint in each o0f the bases. The length of an altitude will be the height of the trapezoid.

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**For a trapezoid with bases b1 and b2 and height h, the area of a trapezoid is given by the formula:**

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**Recall that the diagonals of both rhombuses and kites are**

perpendicular.

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