Sine, Cosine and Tangent
Triangles
Dilations
Formulas
Geometry Regents Facts
100
What ratio is equal to
(opp)/(adj)
Tangent (or Tan)
100
Name three of the triangle similarity postulates
AA, SSS, SAS, ASA
100
What are the two things you need to describe a Dilation?
Scale Factor and Center
100
Pythagorean Theorem
a2+b2=c2
100
When is the Geometry Regents
June 11th. Arrive at 8:45 in uniform with your ID.
200
Which Trigonometric Ratio should I use to solve for Angle B?
Cosine (Cos)
200
45-45-90 triangles are half of which shape?
Square
200
I multiply to corresponding sides to help your pre-image become the image. What am I?
Scale Factor
200
Slope Formula
m = y2 - y1
x2 - x1
200
How many total questions are on the Geometry Regents?
35 Questions
300
For angle A you are given the opposite side and hypotenuse
Set up an equation to solve for the measure of angle A
angle A = sin-1 (O/H)
300
Are these two triangles similar? How do you know?
yes, AA Theorem.
300
What can you draw to help find the center of dilation?
Lines through the image and pre-image point
300
Area of a triangle
A=(BH)/2, or one half of base times height
300
How many multiple choice questions are in part 1?
24 multiple choice questions-- DO NOT LEAVE ANY OF THESE BLANK AT THE END OF YOUR TEST.
400
Solve for Angle B to the nearest degree
angle B = 23
400
What does CPCTC stand for?
Corresponding parts of congruent triangles are congruent
400
Which point is the center of dilation?
point B
400
Area of a circle
Area = pi*(radius squared)
400
Should you attempt the constructed response questions even if you don't think you can finish them?
Yes! You can earn partial credit!
500
What is the value of x (rounded to the nearest tenth)
232/440 = Cos x
x = 58.2
500
Are these two triangles similar? How do you know?
yes, SAS theorem.
500
What's the scale factor between these two triangles?
3 or 1/3
500
Area of a sector
A of a sector= (Pi)r2(degrees of sector/360)
500
What tools will you have on the Regents?
Graphing calculator, compass, straight edge, pencil.