8.3 – Special Right Triangles
(45, 45, 90)
Learning Target 1: to be able to apply the rule of a 45-45-90 triangle.
l
l 2  l 2  h2
Simplified
h
h
45
l
45
l
45˚- 45˚- 90˚
Triangle Theorem
• The legs are congruent
• The hypotenuse is the length of the legs times
45
x
x 2
45
x
2
45˚- 45˚- 90˚
Triangle Theorem
• Solve for the unknown variables.
45˚- 45˚- 90˚
Triangle Theorem
• Solve for the unknown variables.
45˚- 45˚- 90˚
Triangle Theorem
• Solve for the unknown variables.
45˚- 45˚- 90˚
Triangle Theorem
• Solve for the unknown variables.
45˚- 45˚- 90˚
Triangle Theorem
• Solve for the unknown variables.
45˚- 45˚- 90˚
Triangle Theorem
• Solve for the unknown variables.
Homework 
WS