Special Right Triangles and Trig Ratios in Radians

What is the length of y in this picture?

• 45
• 5√2
• 90
• 5

What is the length of x in this 45-45-90 triangle?

• 4√2
• 4
• 8
• 4√3

What is the length of u and v in this 30-60-90 triangle?

• u = 8 v = 4√3
• u = 4√2 v = 8
• u = 16 v = 8
• u = 4√3 v = 8

Find the value of y.

• 9
• 18√2
• 9√2
• (9√2)/2

Solve for x. 
You will need to use 45-45-90 and 30-60-90 triangles.

• 10√3
• 15
• 5√3
• 15√2

Find a.

• 3
• 3√3
• 6
• 2√3

Find the missing side lengths.

• a = 4, b = 4
• a = 4, b = 2√2
• a = 2√2,  b = 4
• a = 4, b = 4

Solve for the misssing distance

• 18.9
• 19.5
• 47
• 27.5

What is the cosine of angle P?

• p/q
• q/r
• p/r
• r/q

Which Trig function do you use?

• Sine
• Cosine
• Tangent