emilye3802 emilye3802
  • 02-07-2019
  • Mathematics
contestada

which equation represents a circle?

which equation represents a circle class=

Respuesta :

jimrgrant1 jimrgrant1
  • 02-07-2019

Answer:

C

Step-by-step explanation:

The equation of a circle centred at the origin is

x² + y² = r² ← r is the radius

Consider

[tex]\frac{x^2}{2^2}[/tex] + [tex]\frac{y^2}{2^2}[/tex] = 1, that is

[tex]\frac{x^2}{4}[/tex] + [tex]\frac{y^2}{4}[/tex] = 1

Multiply through by 4

x² + y² = 4 ← equation of circle

This is the equation of a circle centred at the origin with radius 2

Answer Link

Otras preguntas

Could someone please help me with finding the coordinate pairs of the three circled questions. I can do the graphing on my own
How does uniform linear motion differ from uniform circular motion?
How Do You Graph Order Pairs
What is the cube root of -216?
Euclidean Geometry poem project for 10th grade I need help 12 to 15 sentences and must use 12 terms at the least!
a baseball pitch is clocked at 93 miles per hour.Convert this rate to feet per second.
mei has 32 shells . this is 4 times as many shells as rob has. what is the equation to this
How do u simplify the square root of 175
compare and contrast-how is a solution of salt and water different from a mixture of salt and gravel?
What can you say about the 3's in the number 43,335