Parabola - Study guides, Class notes & Summaries
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Circles and Parabolas with 100% complete solutions
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Equation of a cricle 
(x-h)^2 + (y - k)^2 = r^2 
 
 
 
Equation of a parabola (vertical) 
y - k = (1/4p)(x - h)^2 
 
 
 
 
 
 
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Equation of a parabola (horizontal) 
x - h = (1/4p)(y - k)^2 
 
 
 
Focus 
A fixed point in the parabola 
 
 
 
DIrectrix 
A fixed line outside of the parabola 
 
 
 
Definition of a Circle 
The set of all points in a plane at a certain positive distance (radius) from a certain point (center) 
 
 
 
Definition of a Parabola 
The set of points equidistant ...
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Circles, Parabolas, Ellipses, and Hyperbolas with complete solutions |graded A+
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Circle 
Collection of points equidistant from the center. 
 
 
 
Equations for Circle 
(x-h)^2 + (y-k)^2 = r^2 
 
Where (h,k) = center 
And r = radius 
 
 
 
 
 
 
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Distance Formula 
The square root of 
(x2-x1)^2 + (y2-y1)^2 
 
 
 
Parabola 
Set of points equidistant from a focus and the directrix. 
 
 
 
Equations for Parabolas 
(x-h)^2 = 4p(y-k) 
Up if p>0, down if p<0 
 
(y-k)^2 = 4p(x-h) 
Right if p>0, left if p<0 
 
p = distance 
(h,k) = vertex 
 
 
 
Directrix 
E...
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Circles and Parabolas Quiz with 100% correct answers
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what is the equation for a circle in standard form? 
(x-h)^2 + (y-k)^2 = r^2 
 
 
 
how do you find the center of a circle when the question is given to you in standard form? 
change the signs of the x and the y and put it in parentheses 
 
Ex: Q: (x+3)^2 + (y-1)^2 = 81 
A: (-3, 1) 
 
 
 
 
 
 
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how do you find the radius of a circle when the question is given to you in standard form? 
take the number after the = and square root it 
 
 
 
how do you put an equation in standard for...
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Precalc Parabolas + Circles + Ellipses + Hyperbolas quiz study with 100% complete solutions already graded A
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equation for parabola going through horizontal twice 
x²=4py 
 
 
 
equation for parabola going through vertical twice 
y²=4px 
 
 
 
 
 
 
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directrix of x²=4py 
y=-p 
 
 
 
directrix of y²=4px 
x=-p 
 
 
 
what is the symbol for focus? 
p 
 
 
 
the coordinates for the foci in x²=4py? 
(vertex,vertex±c) 
 
 
 
the coordinates for the foci in y²=4px? 
(vertex±c,vertex) 
 
 
 
what is p? 
the distance from the vertex to the focus 
 
 
 
what is the equation for a circle 
(x...
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Circles and Parabolas 2022/2023 with 100% correct answers
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What is the equation for a circle? 
(x - h)^2 + (y - k)^2 = r^2 
 
 
 
What is the midpoint formula? 
x1+x2/2 ; y1+y2/2 
 
 
 
 
 
 
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How do you know you are going to Graph a circle? 
If addition and if the coefficients are the same. 
 
 
 
How do you get the equation of a circle if it is not in standard form? 
Group the x and y's together then complete the square. 
 
 
 
How do you complete the square? 
Divide the middle coefficient by 2 and square it. Then add it to both sides ...
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Conic Sections- Parabola, Circles, & Ellipse with 100% complete solutions already graded A
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Axis of symmetry 
The line that a parabola is symmetrical about. The vertex and focus are on the axis of symmetry 
 
 
 
What is the equation of a circle with center at (3, -2) and radius = 8? 
(x - 3)² + (y + 2)² = 64 
 
 
 
 
 
 
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What is the equation of a circle with center at (-7, -1) and radius = 3? 
(x + 7)² + (y + 1)² = 9 
 
 
 
What is the equation of a circle with center at (1, 5) and radius = 2? 
(x - 1)² + (y - 5)² = 4 
 
 
 
What is the equation of a circle with ...
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PRECALCULUS Study Questions with Answers
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PRECALCULUS Study Questions with Answers 
 
Rational Number - Answer--any number that is a real number that can be written ass a terminating or repeating decimal 
 
Irrational Number - Answer--real number that cannot be written as a terminating or repeating decimal (square root of 5) 
 
Quadratic Formula - Answer--b±[√b²-4ac]/2a 
 
Factoring Cubes - Answer-a^3+b^3=(a+b) (a^2-ab+b^2) 
-if it is A^3-B^3 then change to (a-b)(a^2+ab+b^2) 
 
Discriminant - Answer--for quadratic expression, the d...
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Circles, Ellipses, Parabolas, and Hyperbolas with 100% complete solution
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Circle 
A defined as a set of points that are equidistant (the same distance) from a certain point 
 
 
 
Hyperbola 
the set of points in a plane whose distances to two fixed points in the plane have a constant difference; a curve consisting of two distinct and similar branches, formed by the intersection of a plane with a right circular cone when the plane makes a greater angle with the base than does the generator of the cone. 
 
 
 
 
 
 
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Ellipse 
a plane curve such that the s...
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Pre Calc 9.1 Circles and Parabolas with 100% correct answers
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(x-h)^2 + (y-k)^2= r^2 
Circle graph formula syntax 
 
 
 
r 
What is the radius in a circle graph? 
 
 
 
 
 
 
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(h,k) 
What is the vertex in a circle graph? 
 
 
 
1. Put all normal numbers on the right side 
2. Make boxes for the x and y expressions 
3. b/2 squared is put next to the expression and on the right 
4. Put in x/y plus or minus b/2 and clean up right side 
How does one complete the square? 
 
 
 
When the x side is squared and p is positive 
When does the graph open...
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MATH 1508 WEEK 4 EXAM REVIEW.Prec 2111 With Well Elaborated Questions And 100% accurate Solutions (verified) LATEST 2024 UPDATE 2024 Week 3 1st Attempt 9/10
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1. A circle can be centered anywhere in the coordinate plane. ANSWER: True 
2. Find the standard equation of the hyperbola which satisfies the given conditions: 
Vertices (-2, 8) and (8, 8), a focus (12, 8) 
ANSWER: (x−3)225−(y−8)256=1(x−3)225−(y−8)256=1 
 
3.What are the coordinates of the center of the circle given by the equation x2+y2-16x- 8y+31=0? 
ANSWER: (8,4) 
 
4.Give the standard equation of the circle satisfying the given condition: center at the origin, radius 4Give ...
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