7.4 special right triangles.notebook
January 07, 2016
1/7/16 - Warm Up Problem
Find the value of x on each triangle.
Write your answers in simplified radical form.
x
30o
12
x
2
60o
6
4
30o
60o
1
7.4 special right triangles.notebook
January 07, 2016
Section 7.4 - Special Right Triangles
Goal: Find the length of legs and hypotenuses by using
relationships of 30-60-90 triangles
30-60-90 triangles
Have angles that measure
30, 60, and 90 degrees
30o
12
2
60o
60o
6
30o
4
2
7.4 special right triangles.notebook
January 07, 2016
30o-60o-90o Triangle Theorem
3
7.4 special right triangles.notebook
January 07, 2016
Find the value of x and y in each special triangle.
• Use the short leg to ind the long leg and hypotenuse values
60o
30o
x
y
y
10
30o
x
60o
21
4
7.4 special right triangles.notebook
January 07, 2016
If you do not know the short leg...
• ind the short leg irst
• use it to ind the other missing side
30o
60
x
o
5
18
30o
y
y
60o
x
5
7.4 special right triangles.notebook
January 07, 2016
Assignment:
7.4 Worksheet
(back)
6