1. Homework 11­3: Text p. 787

4. Find the area of the triangles
10
15
10
click 60o
when 15
ready

5. Lsn 11­4: Area of a Δ A short proof:
click
a altitude
h when ready
C b

6. Find the area of the triangle.
1.
30
10 10
2. 10 150 10

7. 3. Find the area...which angle to use?
12
70 50
15
4. Write the formula with b, c, and angle A given.
5. What if sinA is given? b = 10, c = 6, sinA =

8. 6. Area of a Parallelogram
K = ab sinC (no 1/2....why?)
4
60
5