Todays AgendaGoals

1
Todays Agenda/Goals

• Go over homework 9.3 and 9.1
• Talk about the rocketeer project starting on
  Thursday
• Do lesson 9.4 Special Right triangles.

2
9.4 Special Right Triangles

• Day 1 45o45o90o ?

3
A 45o45o90o ? has what properties?

• What kind of triangle is this?
• In a 45-45-90 Triangle the hypotenuse is v2 times
  as long as each leg.

45o
v2x
x
45o
x
4
Finding the hypotenuse of a 45o45o90o ? theorem
Hypotenuse?
45o
Hypotenuse?
45o

• Conclusion? In a 45o45o90o ? The length of the
  hypotenuse is?.
• v2 times the side length.

45o
45o
45o
Hypotenuse?
Hypotenuse?
45o
45o
45o
5
Finding the leg of a 45o45o90o ? theorem

• Conclusion? In a 45o45o90o ? The length of each
  leg is?.
• The hypotenuse divided by v2 or?
• The hypotenuse times v2 /2

Leg?
Leg?
Leg?
Leg?
Leg?
Leg?
Leg?
Leg?
6
Word problem-A tipping platform is a ramp used to
unload ramps. How high is the end of an 80 foot
ramp when it is tipped by a 45o angle?
45o
45o