EXAMPLE 1 Finding Area and Perimeter of a Triangle Find the area and perimeter of the triangle. A =...
4
EXAMPLE 1 Finding Area and Perimeter of a Triangle nd the area and perimeter of the triangle. A = bh 1 2 P = a + b + c = (14) (12) 1 2 = 13 + 14 + 15 = 84 in. 2 = 42 in.
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Transcript of EXAMPLE 1 Finding Area and Perimeter of a Triangle Find the area and perimeter of the triangle. A =...
EXAMPLE 1 Finding Area and Perimeter of a Triangle
Find the area and perimeter of the triangle.
A = bh 12
P = a + b + c
= (14) (12)12 = 13 + 14 + 15
= 84 in.2 = 42 in.
EXAMPLE 2 Finding the Area of a Triangle
A = bh 12
= (171) (134)12
= 11,457
Sailboats
Find the area of the sail.
Write area formula.
Substitute values.
Multiply.
The area of the sail is 11,457 square inches.
ANSWER
GUIDED PRACTICE for Examples 1 and 2
A triangle’s height is 9 inches and its base is 10 inches. Find its area.
1.
The area of the triangle is 45 in.2.
ANSWER
GUIDED PRACTICE for Examples 1 and 2
A triangle’s side lengths are 4 feet, 6 feet, and 2.5 feet. Find its perimeter.
2.
The perimeter of the triangle is 12.5 ft.
ANSWER
