1. Find the missing parts of a triangle whose sides are 6, 9, and 12
Monday, February 9th
Find the missing parts of a triangle whose sides are 6, 9, and 12

2. Lesson 6.2 part three
Area of Triangles

3. But what if we don’t know some of the information?
We should all know the basic formula to find the area of a triangle (Area = ½ x base x height)
But what if we don’t know some of the information?

4. C A c a b h C A c a b
bsinC B B

5. Use the appropriate oblique triangle formula
When you are given the case of SAS (two sides and the angle between them)…
Use the appropriate oblique triangle formula

6. Find the area of each triangle:
b = 25, c = 12 and A = 46
C = 112, a = 16 and b = 38

7. Find the area of a triangle where b = 16, c = 40 and C = 71

8. If you know SSS (three sides of a triangle), find the area by using Heron’s Formula
where

9. Find the area:
a = 16, b = 24, c = 31
a = 120, b = 202, c = 306

10. Homework: Page 434 #23-27 Page 441 #17-21