Definitions
Section 3-4
Section 3-5
Section 3-7
Section 3-8
100
A line that you add to a diagram to help explain relationships in proofs.
What is an Auxiliary line?
100
If a ll b and b ll c then...
a ll c
100
If you have a triangle which has a side measure of 117, and another measure of 33. what's the third angle measurement?
x=30
100
Write y+2=-(x-4) in slope intercept form.
y=-x+2
100
If two non-vertical lines are parallel then...
Their slopes are equal.
200
The __ of a line is the ratio of the vertical change to the horizontal change between any two points.
What is the Slope?
200
If m is perpendicular to t and n is perpendicular to t then...
m ll n
200
If a triangle has two measurements. One is 52.2 and the other is 44.7. what's the third?
x=83.4
200
Is the line of the following equation vertical or horizantal x=3
Vertical line
200
Are y=-x+6 and y=-x+20 parallel? Explain.
Yes, because they both have a slope of -1.
300
The __ of an equation of a non-vertical line is y=mx+b, where m is the slope and b is the y-intercept
What is Slope intercept form?
300
If n is perpendicular to l and m ll l then...
n is perpendicular to m.
300
A triangle has two measurements. One is 33, the other 57. Find the third.
x=90
300
Is a zero slope vertical or horizontal?
Horizontal.
300
Put 3x+4y=12 and 6x+2y=6 into slope-intercept form, then determine if the lines are parallel. Explain.
No, the slope of the first is different than that the other.
400
The __ of an equation of a non-vertical line is y-y1=m(x-x1), where m is the slope and (x1,y1) is a point on the line.
What is Point-slope form?
400
If two lines are parallel to the same line then...
They are parallel to each other.
400
The triangles two angles are 59 and 43. What's the third?
x=78
400
Is the slope of the following equation positive or negative y=2/3x+1.
Positive slope.
400
Can the y-intercepts of two non-vertical parallel lines be the same? Explain.
No, if two equations represent lines with the same slope and same y-intercept, the equations must represent the same line.
500
__ are coplanar lines that don't intersect.
What are Parallel lines
500
a ll b, b ll c, c ll d. How do a and d relate?
a ll d
500
With triangle exterior angle theorem, find the exterior angle when the interior angles are 80 and 18
x=98
500
Is the slope of the following equation positive or negative y=3x+4
Positive slope.
500
Are y=3 and x=-2 perpendicular? Explain.
Yes, the equations show a horizontal line and a vertical line.
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