Special Right Triangles and Trig Review

Which formula(s) should you use when looking at a 30-60-90 triangle? (select all that apply)

•  $hyp=short\cdot\sqrt{2}$   
  

•  $hyp=short\cdot2$  

•  $long=short\cdot\sqrt{2}$  

•  $long=short\cdot\sqrt{3}$  

Which formula(s) should you use when looking at a 45-45-90 triangle? (select all that apply)

•  $hyp=leg\cdot\sqrt{2}$   
  

•  $hyp=leg\cdot2$  

•  $leg=hyp\cdot\sqrt{2}$  

•  $hyp=leg\cdot\sqrt{3}$  

What is the length of y in this picture?

• 45
• 5√2
• 90
• 5

Tags

CCSS.HSG.SRT.C.8

Find the value of y.

• 9
• 18√2
• 9√2
• (9√2)/2

Tags

CCSS.HSF.TF.A.3

CCSS.HSG.SRT.C.6

CCSS.HSG.SRT.C.8

Find a.

• 3
• 3√3
• 6
• 2√3

Tags

CCSS.HSF.TF.A.3

CCSS.HSG.SRT.C.6

CCSS.HSG.SRT.C.8

What is the correct ratio?

• sin 40 = w/28
• cos 40 = w/28
• tan 40 = w/28
• sin 40 = 28/w

Tags

CCSS.HSG.SRT.C.6

CCSS.HSG.SRT.C.8

What would you use to solve for a?

• sin
• cos
• tan
• Pythagorean theorem

Tags

CCSS.HSG.SRT.C.8

What is the cosine of angle P?

• p/q
• q/r
• p/r
• r/q

Tags

CCSS.HSF.TF.A.3

CCSS.HSG.SRT.C.6

CCSS.HSG.SRT.C.8

What type of special triangle is this?

• 45°-45°-90°
• 30°-60°-90°
• Equiangular
• Equilateral

Tags

CCSS.4.G.A.2

What type of special triangle is this?

• 45°-45°-90°
• 30°-60°-90°
• Isosceles
• Obtuse

Tags

CCSS.4.G.A.2