1. Warm-up
1)A ladder leaning up against a barn makes an angle of 78 degrees with the ground when the ladder is 5 feet from the barn. How long is the ladder? 1.5) You are 55 feet from a tree. The angle of elevation from your eyes, which are 4.5 feet off the ground to the top of the tree is 61 degrees. To the nearest foot, how tall is the tree. 2) 3)

2. Area of a Triangle
Day 5

3. Area of a Triangle
Formula: ½bh where the base and the height are always perpendicular! What is the base and height if it is a right triangle?

4. Examples

5. Examples

6. What happens when you don't have the height of the triangle?

7. So that means that if you have 2 sides and the included angle of a triangle you can use the formula: Area =_______________________

8. You Try