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Perimeter and Area

Perimeter and Area. Equations. Perimeter. When you think of perimeter think of walking the fence around the perimeter of a yard. You walk the length of each side and add the lengths up to get the total distance walked. Perimeter. A triangle has 3 sides to add up.

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Perimeter and Area

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  1. Perimeter and Area Equations

  2. Perimeter • When you think of perimeter think of walking the fence around the perimeter of a yard. • You walk the length of each side and add the lengths up to get the total distance walked.

  3. Perimeter • A triangle has 3 sides to add up. • A rectangle has 4 sides to add up. • A Trapezoid also has 4 sides to add up.

  4. Triangle: Perimeter = Side 1 + Side 2 + Side 3 Perimeter • Rectangle: • Perimeter = Side 1 + Side 2 + Side 3 + Side 4 • Trapezoid: • Perimeter = Side 1 + Side 2 + Side 3 + Side 4

  5. Area • Area is the surface that is surrounded by a shape. Examples: • The grass inside of a fenced-in area. • The rug on the floor of a room. • The turf covering a football field.

  6. Area • Area of a Triangle: • base * height divided by two or A = (b*h)/2 • Area of a Rectangle: • Area = base * height or A = (b*h) • Area = length * width or A = (l*w)

  7. a = 5, b = 4, c = 3 and h = 2 What is the perimeter of the triangle? Practice P = 5 + 4 + 3 P = 12 • What is the area of the triangle? A = (4)(2)/(2) A = 4

  8. Practice l = 5, w = 4 • What is the perimeter of the rectangle? Perimeter = l + l + w + w or P = 2l + 2w P = 2(5) + 2(4) P = 10 + 8 P = 18 • What is the area of the triangle? Area = l*w A = (5)(2) A = 10

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