Area and Perimeter of a Triangle

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Area and Perimeter of a Triangle
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Perimeter

• Sum of all sides

b
a
abc Perimeter
c
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Examples of Perimeter

• 1.) Find the perimeter of the triangle

• 2.) Find x in the triangle with the given
  perimeter

2x
2 in
x9
4 in
x4
3 in
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Area

• A1/2 base (height)
• -height length of the altitude

height
base
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Examples of Area

• 3.) Find the area of the given triangle

• 4.) Find the are of the given triangle

6 in
6 ft
7 ft
- - - - -
10 in
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Example 5

• 5.) The area of a triangle is 45
• The length of the base is 15 in. Find the height.

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Example 6

• 6.) Express the area in terms of t.

t2
t8