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# Geometry Perimeter And Area 1

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### Geometry Perimeter And Area 1

1. 1. Geometry: Perimeter and Area
2. 2. Can You Name the Shape?
3. 3. Geometry: Perimeter and Area <ul><li>New Vocabulary: </li></ul><ul><li>Perimeter: The distance around a geometric figure. </li></ul><ul><li>Formula : An equation that shows a relationship among certain quantities. </li></ul><ul><li>Area: The measure of the surface enclosed by a figure. </li></ul>
4. 4. Width <ul><li>Definition: </li></ul><ul><li>How wide a figure is from side to side. </li></ul>
5. 5. Length <ul><li>Definition: </li></ul><ul><li>The measure of the distance across an figure. </li></ul>
6. 6. Perimeter <ul><li>To calculate the perimeter of any shape, just add up “each” line segment of the “fence”. </li></ul>
7. 7. Perimeter <ul><li>3 in </li></ul><ul><li>2 in </li></ul>2 in 3 in
8. 8. Perimeter <ul><li>3 in </li></ul><ul><li>2 in </li></ul>2 in 3 in P= 2 + 3 + 2 + 3 = 10 in You can find the perimeter of a rectangle by adding all of the sides together.
9. 9. Find the Perimeter Using a Formula
10. 10. PERIMETER OF A RECTANGLE P=2l+2w
11. 11. 2 in. 3 in. Perimeter of a Rectangle P=2l+2w P=2(3 in.) + 2 (2in.) P=6 in. + 4 in. P=10 in.
12. 12. PERIMETER OF A TRIANGLE P=s +s +s 1 2 3
13. 13. Perimeter of a Triangle P=s + s + s <ul><li>2 3 </li></ul>P=8cm+10cm+6cm P= 24 cm 8cm 6cm 10cm
14. 14. Remember <ul><li>Squares ALL sides are equal…so if they give you one side, you know ALL the sides </li></ul><ul><li>Length=the Largest side </li></ul><ul><li>If they “leave” numbers out, they are equal to their opposite side. If they give you the bottom of a square/rectangle type shape then the top is the same </li></ul>
15. 15. Finding area of an irregular figure <ul><li>Box the object in then count the length and the width of the “box”. </li></ul><ul><li>Example: </li></ul><ul><li>Length = 4 </li></ul><ul><li>Width = 5 </li></ul>
16. 16. Find The Perimeter What is the perimeter of this figure?
17. 17. Area Area is the amount of surface space that a flat object has. Area is reported in the amount of square units.
18. 18. AREA <ul><li>Square units means that “that” many squares fit inside that shape (if measured in feet…it’s feet…if meters…it’s meters. In this example the area is 4 square units…note 4 squares fit) </li></ul>1 2 units (ft, in, m) 2 3 4
19. 19. Count the number of blue squares to determine the area of that surface. The area is equal to 9 squares.
20. 20. Area = 15 square feet What is the area of this surface if each square is equal to one foot? Count the number of squares. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
21. 21. Two neighbors build swimming pools. This is what the pools look like. Which family has the pool with the bigger swimming area?
22. 22. The area of Family A’s pool is 8 square units. The area of Family B’s pool is 7 square units. Therefore, Family A has the pool with the bigger swimming area.
23. 23. Area of Squares/Rectangles <ul><li>Length x Width=Area </li></ul>2 Length(2) x Width(2) = 4 square units
24. 24. Parallelogram Area <ul><li>Area=Base x Height </li></ul><ul><li>(Area=length x width) </li></ul>BASE (length) Height (width) 8 5 Base 8 x Height 5 = Area 40 The diagonal line is NOT the height!!!