Notes ­ Area of a Triangle.notebook
September 22, 2014
Area of Oblique Triangles
EQ: What are the properties of oblique triangles?
Sep 21­10:22 PM
Vocabulary
Oblique Triangle ­ a triangle that does not have a right angle; it can either be an acute or an obtuse triangle.
Sep 21­10:26 PM
1
Notes ­ Area of a Triangle.notebook
September 22, 2014
Naming a Triangle
Sep 21­10:25 PM
How do you find the area of a triangle?
Area = 1/2(base)(height)
Sep 21­10:27 PM
2
Notes ­ Area of a Triangle.notebook
September 22, 2014
How do you find the height of an oblique triangle?
10
40o
14
Sep 21­10:27 PM
How do you apply this to change the formula for area of a triangle?
a
Co
b
Sep 21­10:27 PM
3
Notes ­ Area of a Triangle.notebook
September 22, 2014
Find the area.
10
40o
14
Sep 21­10:27 PM
Find the area of the obtuse triangle.
5
118o
8
Sep 21­10:33 PM
4
Notes ­ Area of a Triangle.notebook
September 22, 2014
Heron's Formula:
Semiperimeter
s = 1/2(a + b + c)
Sep 21­10:56 PM
Find the area of the triangle using Heron's Formula
8
9
13
Sep 21­11:00 PM
5