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Perimeter How do we find the perimeter of a quadrilateral? Standards: M5P3, M5P4, and M5A1c

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Key Vocabulary Vertex – the point where two sides of a polygon meet Triangle – a polygon made up of three line segments Square – A quadrilateral with four right angles and four congruent sides Quadrilateral – a four sided figure Polygon – a closed figure with three or more sides

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How do we find the PERIMETER of a quadrilateral? Perimeter – the distance around a plane figure How do you think that you would find the perimeter of this figure? 3 10

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Finding the perimeter You may find the sum of all the sides You may also use a formula for rectangles: P stands for perimeter L stands for length W stands for width P = 2 × l + 2 × w 2L + 2w

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Find the perimeter of a square A square has four congruent sides, meaning that a square has four sides that all have the same length. P = perimeter S = side Then, the formula for finding the perimeter of a square is: P = 4s

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Finding the Missing Length Sometimes problems will give you the perimeter, but you must work backwards to find the missing length. This means that you will have to know the attributes of a shape. Find the missing measurement. 22ft P = 62 ft

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