Transformations
List the 4 types of Transformations
Translations, Rotations, Reflections, Dilations
What is the line that cuts parallel lines called?
Transversal
What is Pythagorean Theorem?
a2 + b2 = c2
What are the problems called that include either greater than or less than?
Inequalities
What is the first thing to do with a scatterplot question?
Draw a trend line
What is formula to find the scale factor?
Scale Factor = new/original
What determines if two triangles are similar?
If all 3 angles of one triangle are congruent to the corresponding angles of the other triangle.
What is the letter used for unknown numbers called?
A variable
Solve for the y-intercept using the point (4,11)
y=4x+b
B=-5
How many answers (usually) can you eliminate without any math?
2 answers.
Remember, 2 answers usually do not make any sense to the question.
If an coordinate pair (x,y) is reflected across the x-axis, which point changes value?
y-value
What is the name of the theorem that states the sum of the two non-adjacent angles is equal to the exterior angle?
Exterior Angle Theorem
With rotations and dilations, what point is usually the point used to rotate or dilate around?
The origin
What is the slope of the line that includes the points (2,9) and (8,24)?
M = 2.5
Of the following, what are you NOT allowed to use on the Math STAAR?
a. Highlighter c. Dictionary
b. Calculator d. Patty/Notebook paper
C. Dictionary
Name the following transformation from the following algebraic expression:
(x,y) --- (-y,x)
(2 acceptable answers)
90 degree clockwise rotation
OR
270 degree counterclockwise rotation
If a=6 in and c=25 in, what is the measurement of b?
Round answer to the nearest tenth.
24.3 in
What is the point-slope formula?
y2-y1/x2-x1
Solve for the MAD of the following set of numbers
(4, 9, 12, 5, 7, 11)
Round to the nearest tenth.
MAD = 2.7
How many test do you have to pass in order to move onto the 9th Grade?
3 total
Reading, Math, and 1 of Science or Social Studies
If the new area of a rectangle is 384 in2 and the original area was 24 in2, what was the scale factor used?
Scale factor of 4
New Area = Old Area * (Scale Factor)2
Scale Factor = sqrt(364/24) = 4
If triangle that has a base of 18 cm and a height of 38 cm is enlarged by a scale factor of 2, what is the area of the new triangle?
1,368 cm2
New base = 36 cm and new height = 76
Area = 36*78/2
What is the volume formula for a sphere?
V= 4/3*(pi)*r3
What is the solution of equations (x,y) of:
y=8x-4
and
y=3x+11
(3,20)
On the STAAR test, which questions should you do first?
The ones you KNOW how to do.