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Math Ex: Unit 4 - 2017-2018
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Gravity
Key Concepts:
Terms in this set (35)
Pi
The distance around the circle divided by the distance across the circle: 22 / 7.
Circumference
The length around a circle: 2 × π × radius OR π x d
Area of a Circle
The measurement of the amount of space inside a circle: π x r x r
Radius
Half the distance across a circle: d / 2
Diameter
The distance across a circle: 2r
Perimeter
the measured distance around a closed figure.
Surface Area
Sum of all the areas of a 3 dimensional shape.
Area
The measure of the inside of a surface of a shape.
Reflection over x axis
Flip over the x-axis by counting to x-axis
A(-2, 4) to A'(-2,-4)
Reflection over y axis
Flip over the y-axis by county to y-axis
C(-2,0) to C'(2,0)
Clockwise
To rotate the direction a clock would.
Counterclockwise
To rotate the opposite direction a clock would.
Rotation 90 degrees clockwise
Turning to the next quadrant clockwise
Ex. Moving from Quadrant II to Quadrant I
B(-2,8) to B'(8,2)
Rotation 90 degrees counterclockwise
Turning to the next quadrant counterclockwise
Ex. Moving from Quadrant III to Quadrant IV
C(-7, -3) to C'(3,-7)
Rotation 180 degrees
Turning two quadrants in either direction.
Scale Factor
The number by which you multiply the ordered pairs
Coordinate Plane
X-axis
Y-axis
Ordered Pairs
The (x , y) coordinates on a Coordinate Plane.
Quadrant I
Top Right Quadrant
Quadrant II
Top Left Quadrant
Quadrant III
Bottom Left Quadrant
Quadrant IV
Bottom Right Quadrant
Translation
Sliding a figure on a coordinate plane. The orientation of the figure stays the same.
Square
Four congruent sides and four right angles.
Rectangle
Two sets of congruent sides. Opposite sides are congruent. Four right angles.
Parallelogram
Two sets of congruent sides. Opposite sides are congruent. Composed of two triangles and a rectangle.
Rhombus
Four congruent sides.
Circle
360 degrees.
Semicircle
Half a circle. 180 degrees.
Independent Variable
-the "x"
-the variable that you change
Dependent Variable
-the "y"
-the variable that is affected by the change
Input Value
-the x value plugged into the function rule
(days)
Output Value
-the y value plugged into the function rule
($)
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