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
This theorem can be used to find the length of a side of a right triangle.
a2+b2=c2
100
How many different parts are on the Geometry Regents?
4 Parts
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
This formula can be used to find the area of a shape with 4 right angles and all equal sides.
A = s^2
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
This formula can be used to find the area of a sector.
A = (x/360)pir^2
300
How many multiple choice questions are in part 1?
24 Part 1 Questions.
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
This equation is used to find the slope between two points.
m =
(y_2-y_1)/(x_2-x_1)
400
How many points is part 4 worth?
6 Points
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
If a line has an equation of y = 2x+8, what slope does another need to have to be perpendicular to it?
-1/2
500
When is the geometry regents?
June 23rd