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Quadrilaterals II by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Quadrilateral Family parallelogram rectangle trapezoid square rhombus Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Definition Perimeter – (P) The distance around a figure. 5 9 in. 9 5 5 in. 5 in. + 9 28 in. 9 in. Copyright © 2000 by Monica Yuskaitis

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**Find the perimeter 9 cm. 9 9 cm. 9 cm. 9 9 + 9 36 cm. 9 cm.**

A shortcut for the square is 4 x side. Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Find the perimeter 7 cm. 9 9 cm. 9 cm. 7 9 + 7 36 cm. 7 cm. Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Find the perimeter 10 ft. 10 10 ft. 10 ft. 6 10 + 10 36 ft. 6 ft. Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Find the perimeter 18 m. 12 12 m. 15 m. 11 15 + 18 11 m. 56 m. Copyright © 2000 by Monica Yuskaitis

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**Area – (A) the measure, in square units, of the surface of a figure.**

Definition Area – (A) the measure, in square units, of the surface of a figure. The area of this rectangle is 8 squares. Copyright © 2000 by Monica Yuskaitis

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**How to find the area of a square or rectangle.**

Step 1 – Multiply the length times the width. (A = l x w) 5 x 3 3 cm. 15 5 cm. Copyright © 2000 by Monica Yuskaitis

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**How to find the area of a square or rectangle.**

Step 2 – Indicate that the answer is in square centimeters by writing the exponent 2 after the unit of measure. 5 x 3 3 cm. 15 cm.2 5 cm. Copyright © 2000 by Monica Yuskaitis

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**How to find the area of a square or rectangle.**

Step 3 – Read the answer: 15 square centimeters. 5 x 3 3 cm. 15 cm.2 5 cm. Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

What is the area? 5 x 6 5 ft. 30 ft.2 6 ft. You say: 30 square feet. Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

What is the area? 2 2 in. x 6 12 in.2 6 in. You say: 12 square inches. Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

What is the area? 7 4 m. x 4 28 m.2 7 m. You say: 28 square meters. Copyright © 2000 by Monica Yuskaitis

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**How to find the area of a parallelogram**

Step 1 – Multiply the base times the height. (A = b x h) height 90º base Copyright © 2000 by Monica Yuskaitis

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**How to find the area of a parallelogram**

Step 1 – Multiply the base times the height. (A = b x h) 2 13 height 17 x 13 in. 90º 9 1 + 1 3 base 17 in. 221 Copyright © 2000 by Monica Yuskaitis

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**How to find the area of a parallelogram**

Step 2 – Indicate that the answer is in square inches by writing the exponent 2 after the unit of measure. 13 x 17 height 9 1 13 in. 90º 1 3 + 221 in. 2 base 17 in. Copyright © 2000 by Monica Yuskaitis

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**How to check the area of a parallelogram**

height 2 cm. 90º base 4 cm, 4 x 2 = 8 cm.2 First find the area. Copyright © 2000 by Monica Yuskaitis

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**How to check the area of a parallelogram**

4 x 2 = 8 cm.2 height 2 cm. 90º base 4 cm, Cut off the piece at the dotted line. Copyright © 2000 by Monica Yuskaitis

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**How to check the area of a parallelogram**

4 x 2 = 8 cm.2 height 2 cm. 90º base 4 cm, Cut off the piece at the dotted line. Copyright © 2000 by Monica Yuskaitis

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**How to check the area of a parallelogram**

4 x 2 = 8 cm.2 height 2 cm. 90º base 4 cm, Move this piece to the other side. Copyright © 2000 by Monica Yuskaitis

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**How to check the area of a parallelogram**

4 x 2 = 8 cm.2 height 2 cm. 90º base 4 cm, Move this piece to the other side. Copyright © 2000 by Monica Yuskaitis

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**How to check the area of a parallelogram**

4 x 2 = 8 cm.2 height 2 cm. 90º base 4 cm, Now you have a rectangle 4 x 2 cm. Copyright © 2000 by Monica Yuskaitis

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**How to check the area of a parallelogram**

4 x 2 = 8 cm.2 width 2 cm. length 4 cm, What is the area of this rectangle? Copyright © 2000 by Monica Yuskaitis

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**How to check the area of a parallelogram**

4 x 2 = 8 cm.2 width 2 cm. length 4 cm, That’s right! 8 cm2 The same as the parallelogram. Copyright © 2000 by Monica Yuskaitis

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**What is the area of this parallelogram?**

5 height 5 cm. x 7 35 cm.2 base 7 cm. You say: 35 square centimeters Copyright © 2000 by Monica Yuskaitis

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**What is the area of this parallelogram?**

height 5 ft. 5 x 6 30 ft.2 base 6 ft. You say: 30 square feet. Copyright © 2000 by Monica Yuskaitis

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**What is the area of this parallelogram?**

height 10 m. 10 x 5 50 m.2 base 5 m. You say: 50 square meters. Copyright © 2000 by Monica Yuskaitis

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