Ratios and Proportions
Ratios applied
Transformations 1
Transformations 2
Similar Triangles (proofs)
100
Are the following true ratios?
2/3,34/51
Yes
100
ABC~DEF
If AB = 4, ED = 2, FD = 1, what does AC measure?
AC = 2
100
The value of which coordinate changes when a point is flipped across the x-axis?
The y coordinate
100
A triangle in quadrant II is rotated 90o clockwise, in what quadrant is it now?
Quadrant I
100
When writing a proof, what reason should usually go on the first line?
The given
200
Solve for x:
3/x=9/12
x=4
200
QRS~TUV
If RQ = 10, UT = 20, VT = 18, what is the measure of SQ?
SQ = 9
200
Write the following in vector notation:
(x,y)to(x+2,y-1)
<2,-1>
200
If a shape in quadrant I is dilated by a scale factor of 1/2, in what quadrant does it end up?
Quadrant I
200
Describe what it means for a line to be bisected
Divided into two equal parts (segments)
300
Solve for the variable:
12/17=x/85
x=60
300
DE is a parallel mid-segment. If DE measures 13.2 cm, what does CB measure?
CB = 26.4
300
Translate the points by the vector <3,-3>
A(-2, 1) B(0, 0)
A'(1, -2) B'(3, -3)
300
If a shape in quadrant I is dilated by a scale factor of -2, in what quadrant does it end up?
Quadrant III
300
If the same line is a part of two triangles, what property can be used to show congruence?
The reflexive property
400
Solve for the variable:
10/(3x+6)=2/x
x=3
400
Solve for the variable:
x = 6
400
Translate the point by the vector <2, -1> and then flip it across the y-axis.
T(4, 3)
T'(-6, 2)
400
Dilate the following points by a scale factor of 3/4:
A(12, 4) B(-8, 0)
A'(9, 3) B'(-6, 0)
400
What are the 4 ways to prove triangles are congruent?
SSS, SAS, ASA, and AAS
500
Solve for the variable:
5/x = x/20
x=10, -10
500
Solve for the missing variable:
x = 5
500
If A'(5, -2) was flipped across the x-axis and then translated by the vector <1, -4>, what are the coordinates of A?
A(4, -2)
500
Reflect the points across the y-axis and then dilate them by a scale factor of -2.
C(-2, 3) D(1/2, -6)
C'(-4, -6) D'(1, 12)
500
If we know that line AB = CD, and line AB = PQ, what can we determine by which property?
CD = PQ, transitive property