Triangles
How many degrees are in a triangle?
180 degrees
When shapes have the same angles but different side lengths
similar
The formula for slope is...
rise/run or vertical/horizontal
yes- SF=1
a square has the side length of 4 cm what is the perimeter of the square
16
If a triangle has the angle measure 33 and 92, what would the third angle be?
55
When a shape has the same angles AND same side lengths
congruent
If a slope is positive that means you are going...
uphill
Do dilations change the angles of a shape?
No!
a square has the side length of 4 cm what is the area of the square
16
If a triangle has angle measures 60 and 78 what is the third angle?
42
What does the x and y refer to in this equation y=mx + b
(X,Y) Coordinates
Which line has the biggest rise
1. slope= 3
2. slope= 1/2
3. slope= 1/3
4. slope= 5
the one with a slope = 5!!
Do dilations result in shapes that are similar?
Yes- the angles don't change just the side lengths!
What would the point (3,2) become if it is rotated 180 degrees
(-3,-2)
What is the are for a triangle with sides lengths of 20 and a height of 10.
—100
A = 1/2bh
When we dilate a shape we multiply the lengths by a _______ _________.
scale factor
A horizontal line has a slope of...
zero!
Dilations where the scale factor is less than 1 is.
Reduction
What would the point (6,8) be if it is rotated 90 degrees clockwise
(8,-6)
An equilateral triangle has what angle measures?
60 for each angle!!
The steepness or "grade" of a line is considered the...
slope
A vertical line has a slope of...
undefined
6 to 12
5 to 10
4 to 8
a scale factor of 2!
What is the equation to find slope
y2 - y1
————
x2 - x1