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Write Down the Equations of the Circles

In this worksheet, students write down the equations of the given circles.

'Write Down the Equations of the Circles' worksheet

Key stage:  KS 4

Curriculum topic:  Algebra

Curriculum subtopic:  Plot and Interpret Graphs to Resolve Simple Kinematic Problems

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

This worksheet is about equations of circles.

 

Example

Write down the equation for the given circle:


Hint: Measure the radius first.

Answer

Radius is 5½

We work out the square of 5½ which is 30¼.

Equation is....


x2 + y 2 = 30 1
4

 

Note

Use fractions in this worksheet.  All radii are on the quarter, half, third or two-thirds marks.

Write down the equation for the given circle:

Hint: Measure the radius first.

Write down the equation for the given circle:

Hint: Measure the radius first.

Write down the equation for the given circle:

Hint: Measure the radius first.

Write down the equation for the given circle:

Hint: Measure the radius first.

Write down the equation for the given circle:

Hint: Measure the radius first.

Write down the equation for the given circle:

Hint: Measure the radius first.

Write down the equation for the given circle:

Hint: Measure the radius first.

Write down the equation for the given circle:

Hint: Measure the radius first.

Write down the equation for the given circle:

Hint: Measure the radius first.

Write down the equation for the given circle:

Hint: Measure the radius first.

  • Question 1

Write down the equation for the given circle:

Hint: Measure the radius first.

CORRECT ANSWER
EDDIE SAYS
x2 + y 2 = 28 4
9
  • Question 2

Write down the equation for the given circle:

Hint: Measure the radius first.

CORRECT ANSWER
EDDIE SAYS
x2 + y 2 = 30 1
4
  • Question 3

Write down the equation for the given circle:

Hint: Measure the radius first.

CORRECT ANSWER
EDDIE SAYS
x2 + y 2 = 13 4
9
  • Question 4

Write down the equation for the given circle:

Hint: Measure the radius first.

CORRECT ANSWER
EDDIE SAYS
x2 + y 2 = 18 7
9
  • Question 5

Write down the equation for the given circle:

Hint: Measure the radius first.

CORRECT ANSWER
EDDIE SAYS
x2 + y 2 = 21 7
9
  • Question 6

Write down the equation for the given circle:

Hint: Measure the radius first.

CORRECT ANSWER
EDDIE SAYS
x2 + y 2 = 6 1
4
  • Question 7

Write down the equation for the given circle:

Hint: Measure the radius first.

CORRECT ANSWER
EDDIE SAYS
x2 + y 2 = 12 1
4
  • Question 8

Write down the equation for the given circle:

Hint: Measure the radius first.

CORRECT ANSWER
EDDIE SAYS
x2 + y 2 = 11 1
9
  • Question 9

Write down the equation for the given circle:

Hint: Measure the radius first.

CORRECT ANSWER
EDDIE SAYS
x2 + y 2 = 5 4
9
  • Question 10

Write down the equation for the given circle:

Hint: Measure the radius first.

CORRECT ANSWER
EDDIE SAYS
x2 + y 2 = 20 1
4
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