# 2D Geometry Questions and Answers

Geometry

2D GeometryWhat is the center of the circle x² + y² - 36 = 16x? Simplify any fractions.
_____ , ______

Geometry

2D GeometryThe point Q lies on the segment PR.
Find the coordinates of Q so that PQ is 3/5 of PR
Coordinates of Q:(______)

Geometry

2D GeometryWhat is the radius of the circle x² + y² + 11x + 30 = 0?
Write your answer in simplified, rationalized form.

Geometry

2D GeometryGraph the circle x² + y² - 2y = -21 + 12x.
Plot the center. Then plot a point on the circle. If you make a mistake, you can erase your circle by moving the second point onto the first.

Geometry

2D GeometryThe manager of a coffee shop has one type of coffee that sells for $6 per pound and another type that sells for $12 per pound. The manager wishes to mix 70 pounds of the $12 coffee to get a mixture that will sell for $8 per pound. How many pounds of the $6 coffee should be used?

Geometry

2D GeometryGraph the circle 3x² + 3y² - 48 = 0.
Plot the center. Then plot a point on the circle. If you make a mistake, you can erase your circle by moving the second point onto the first.

Geometry

2D GeometryDonna is making candles in the shape of a cylinder. She needs to determine how many cubic centimeters of wax she needs. Use the button or 3.14 in your computation. Round your answers to the nearest tenth as needed. If the radius of each candle is 5 cm and the height of each candle is 10 cm
(a) How much wax is needed for one candle? ____
cubic cm
(b) How much wax is needed for 60 candles? ____
cubic cm

Geometry

2D GeometrySolve using the quadratic formula.
2r²+8r - 1 = 0
Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.
r= or r=

Geometry

2D GeometryThe equation of a parabola is y = x² + 4x + 12. Write the equation in vertex form. Write any numbers as integers or simplified proper or improper fractions.

Geometry

2D GeometryTV screens are measured on the diagonal. If we have a TV-cabinet that is 58 inches long and 46 inches high, how large a TV could we put in the space (leave 2-inches on all sides for the edging of the TV)? Round your answer to the nearest tenth.
The screen can measure up to____inches on the diagonal.

Geometry

2D GeometryThe equation of a parabola is y = x² + 8x + 8. Write the equation in vertex form. Write any numbers as integers or simplified proper or improper fractions.

Geometry

2D GeometryThe equation of a parabola is y = x² - 8x + 24. Write the equation in vertex form. Write any numbers as integers or simplified proper or improper fractions.

Geometry

2D GeometryThe equation of a parabola is y = x² - 10x + 25. Write the equation in vertex form. Write any numbers as integers or simplified proper or improper fractions.

Geometry

2D GeometrySolve using the quadratic formula.8n² - 8n - 1 = 0
Write your answers as integers, proper or improper fractions in simplest form, or decimals
rounded to the nearest hundredth.
n=_____or n= ______

Geometry

2D GeometryThe equation of a parabola is y = x² - 6x + 14. Write the equation in vertex form. Write any numbers as integers or simplified proper or improper fractions.

Geometry

2D GeometrySolve using the quadratic formula.
-5y² - 6y = 0
Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.
y = or y=

Geometry

2D GeometryThe equation of a parabola is y=-3x²-(3x) + 38. Write the equation vertex form. Write any numbers as integers or simplified proper or improper fractions.

Geometry

2D GeometrySolve using the quadratic formula.
2x² + 4x + 2 = 0
Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.
X = or x =

Geometry

2D GeometryWhat is the focus of the parabola y = -(7x²)?
Simplify any fractions. (___, ____)

Geometry

2D GeometryShow that given 15 points in a rectangle with length 3 meters and width 1 meter, there exists two points that are at most 1/√2 apart.

Geometry

2D GeometryWhat is the focus of the parabola y = (-5x²) - 6?
Simplify any fractions. (____ ,____)

Geometry

2D GeometryThe equation of a parabola is y = x² - (6x) + 1. Write the equation in vertex form. Write any numbers as integers or simplified proper or improper fraction.

Geometry

2D GeometryWhat is the focus of the parabola y = -(3x² )+ 1?
Simplify any fractions.(___, ___)

Geometry

2D GeometryWhat is the focus of the parabola y=-3x² - 5?
Simplify any fractions. (____ , ____)

Geometry

2D GeometrySolve the traveling salesman problem for the graph below by finding the total height of all Hamilton circuits and determining a circuit with minimum total weight.

Geometry

2D GeometrySelect the correct answer.
You pick a card from a shuffled pack and draw a king. You put it back in the pack, shuffle, and then pick another card. This time you draw a queen. How are the two events of picking a king and picking a queen related?
A. dependent
B. independent
C. codependent
D. mutually exclusive

Geometry

2D GeometryWrite, in radians, the related angles (remaining family members) from 0 to 2π for each of the
following angles.
a) 3π/13
b) 0.89 (correct to two decimal places)

Geometry

2D GeometryOf all the soft drink consumers in a particular sales region, 30% prefer Brand A and 70% prefer Brand B. Of all these soft drink consumers, 20% prefer Brand A and are female. and 40% prefer Brand B and are female. What is the probability that a randomly selected consumer is female, given that the person prefers Brand A?
A. 0.18
B. 0.21
C. 0.34
D. 0.67

Geometry

2D GeometryThe general form of the equation of a circle is Ax² + By² + Cx+ Dy+ E= 0, where A =B≠0. If the circle has a radius of 3 units and the center lies on the y-axis, which set of values of A. B. C. D. and E might correspond to the circle?

Geometry

2D Geometryin a group of 55 people, 33 are coffee drinkers and 12 are tea drinkers. Assuming that no one in this group drinks both tea and coffee, what is the probability that a person picked at random from the group does not drink tea or coffee?
A)3/5
B)2/5
C)7/11
D)2/11

Geometry

2D Geometry250 employees in an organization were surveyed about their hair color and height. The data collected probability that the person is taller than 180 centimeters and has black hair?
A 0.257
B. 0.351
C. 0.360
D. 0.116

Geometry

2D GeometryWhat type of triangle is formed by joining the points D(7, 3), E(8, 1), and R4,-1)?
A. equilateral triangle
B. isosceles triangle
C. right triangle
D. acute scalene triangle
E. obtuse scalene triangle

Geometry

2D GeometryAnswer the question based on the data in the table.
Hemoglobin
Level Less than 25-35 years Above 35 years Total
25 years
Less than 9 21 32 76 129
Between 9 and 49 52
Above 11 69 40
Total 139 128 162 429
Select the correct answer.
What is the probability that a person who is above 35 years old has a hemoglobin level of 9 or above?
A. 0.357
B. 0.313
C. 0.531
D. 0.343
E. 0.432

Geometry

2D GeometryThe probability of a randomly selected employee of a company being male is 60%. The probability of the employee being less than 30 years old is 70%. If the probability of the employee being less than 30 years old given that the employee is a male is 40%, what is the probability that the employee is a male, given that the employee is less than 30 years old?
A. 0.34
B. 0.42
C. 0.55
D. 0.69
E. 0.71

Geometry

2D GeometryA circle is defined by the equation given below.
x² + y² - x - 2y - 11/4=0
What are the coordinates for the center of the circle and the length of the radius?
A. (1/2, 1), 4 units
B. (–½, −1), 2 units
C. (-1/2,-1), 4 units
D. (1/2, 1), 2 units

Geometry

2D GeometryGiven hexagon JKLMNO - hexagon PQRSTU, LK =15, JO=22, and QR=4, find the scale factor from JKLMNO to PQRSTU. Give your answer in decimal form rounded to the nearest hundredths.
Keep in mind, is the figure getting smaller or bigger? Figures getting smaller would have a scale factor less than 1. Figures getting larger would have a scale factor greater than 1.

Geometry

2D GeometryThe general form of the equation of a circle is 7x² + 7y²-28x+42y-35 = 0.
The equation of this circle in standard form is________ the centre of the circle is at the point _____and its radius is _____units