CIRCLE command methods in AutoCAD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a circle by specifying its center point.

AutoCAD

CIRCLE [1] 5

Drag options to blanks, or click blank then click option'

ACENTER

BRADIUS

CDIAMETER

DTWO_POINTS

Attempts:

3 left

💡 Hint

Common Mistakes

Using RADIUS instead of CENTER when specifying the center point.

Confusing DIAMETER with CENTER.

The CENTER method requires you to specify the center point of the circle.

2fill in blank

medium

Complete the code to create a circle by specifying its radius.

AutoCAD

CIRCLE CENTER 0,0 [1] 10

Drag options to blanks, or click blank then click option'

ADIAMETER

BCHORD

CRADIUS

DTWO_POINTS

Attempts:

3 left

💡 Hint

Common Mistakes

Using DIAMETER instead of RADIUS.

Trying to use TWO_POINTS when only one point and radius are needed.

The RADIUS method specifies the distance from the center to the edge of the circle.

3fill in blank

hard

Fix the error in the code to create a circle using two points on the circumference.

AutoCAD

CIRCLE [1] 0,0 5,0

Drag options to blanks, or click blank then click option'

ATWO_POINTS

BCENTER

CRADIUS

DDIAMETER

Attempts:

3 left

💡 Hint

Common Mistakes

Using CENTER or RADIUS when two points are given.

Using DIAMETER which requires a different input.

The TWO_POINTS method creates a circle by defining two points on its circumference.

4fill in blank

hard

Fill both blanks to create a circle by specifying its diameter with two points.

AutoCAD

CIRCLE [1] 1,1 [2] 4,1

Drag options to blanks, or click blank then click option'

ATWO_POINTS

BRADIUS

CDIAMETER

DCENTER

Attempts:

3 left

💡 Hint

Common Mistakes

Using RADIUS instead of DIAMETER with TWO_POINTS.

Using CENTER when two points are given.

The TWO_POINTS method is used with DIAMETER to create a circle by specifying two points on the diameter line.

5fill in blank

hard

Fill all three blanks to create a circle by specifying center, radius, and a chord length.

AutoCAD

CIRCLE [1] 2,2 [2] 6 [3] 4

Drag options to blanks, or click blank then click option'

ACENTER

BRADIUS

CCHORD

DDIAMETER

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up DIAMETER and CHORD.

Omitting the CHORD parameter.

Use CENTER to specify the center point, RADIUS for the circle size, and CHORD to define a chord length inside the circle.

Practice

1.

Which method of the CIRCLE command in AutoCAD allows you to draw a circle by specifying its center point and radius?

easy

A. 2 Points

B. 3 Points

C. Center, Radius

D. Tan, Tan, Radius

Solution

1. Step 1: Understand the Center, Radius method

   This method requires you to pick the center point of the circle and then enter the radius length.

2. Step 2: Compare with other methods

   Other methods use points on the circle or tangents, but only Center, Radius uses center and radius directly.

3. Final Answer:

   Center, Radius -> Option C

4. Quick Check:

   Center + radius = Center, Radius [OK]

Hint: Center and radius is the simplest circle method [OK]

Common Mistakes:

• Confusing 2 Points method with Center, Radius
• Thinking 3 Points method uses radius
• Mixing tangent methods with center-radius

2.

Which of the following is the correct syntax to start the CIRCLE command and draw a circle by specifying two points on its circumference?

easy

A. Type CIRCLE, then select 2 Points and pick two points on the circle

B. Type CIRCLE, then select 3 Points and pick three points on the circle

C. Type CIRCLE, then select Center and Radius

D. Type CIRCLE, then select Tan, Tan, Radius

Solution

1. Step 1: Recall the 2 Points method

   After typing CIRCLE, choosing 2 Points lets you pick two points on the circle's edge to define it.

2. Step 2: Verify other options

   Center and Radius needs center point and radius, 3 Points needs three points, Tan, Tan, Radius uses tangents.

3. Final Answer:

   Type CIRCLE, then select 2 Points and pick two points on the circle -> Option A

4. Quick Check:

   2 Points method = pick two points on circumference [OK]

Hint: 2 Points method needs exactly two points on circle edge [OK]

Common Mistakes:

• Selecting Center and Radius instead of 2 Points
• Confusing 3 Points with 2 Points method
• Using tangent method syntax incorrectly

3.

What will happen if you use the CIRCLE command with the 3 Points method and select three points that are collinear (all on a straight line)?

medium

A. AutoCAD will draw a circle passing through the three points

B. AutoCAD will show an error saying points are invalid

C. AutoCAD will draw a circle with zero radius

D. AutoCAD will draw a circle using only the first two points

Solution

1. Step 1: Understand 3 Points method requirements

   The 3 Points method requires three points that form a triangle to define a unique circle.

2. Step 2: Analyze collinear points case

   If points are collinear, no unique circle can pass through all three, so AutoCAD shows an error.

3. Final Answer:

   AutoCAD will show an error saying points are invalid -> Option B

4. Quick Check:

   Collinear points cause error in 3 Points method [OK]

Hint: 3 Points must not be in a straight line [OK]

Common Mistakes:

• Assuming circle draws with zero radius
• Thinking AutoCAD ignores third point
• Believing AutoCAD draws circle anyway

4.

You tried to draw a circle using the Tan, Tan, Radius method but AutoCAD gave an error. Which of the following is the most likely cause?

medium

A. You entered a radius smaller than zero

B. You used the 3 Points method instead

C. You did not specify the center point first

D. You selected only one tangent line instead of two

Solution

1. Step 1: Recall requirements for Tan, Tan, Radius

   This method needs two tangent objects and a positive radius value.

2. Step 2: Identify invalid radius input

   Entering a radius less than zero is invalid and causes an error in AutoCAD.

3. Final Answer:

   You entered a radius smaller than zero -> Option A

4. Quick Check:

   Radius must be positive in Tan, Tan, Radius method [OK]

Hint: Radius must be positive for tangent circle method [OK]

Common Mistakes:

• Selecting only one tangent instead of two
• Forgetting to pick center point (not needed here)
• Confusing method with 3 Points

5.

You need to draw a circle tangent to two existing lines and with a radius of 5 units. Which CIRCLE command method should you use, and what steps will you follow?

hard

A. Use 3 Points; pick three points on the circle edge

B. Use 2 Points; pick two points on the circle edge

C. Use Center, Radius; pick center then enter 5

D. Use Tan, Tan, Radius; select two tangent lines then enter 5

Solution

1. Step 1: Identify the requirement for tangency and radius

   Since the circle must be tangent to two lines and have a specific radius, the Tan, Tan, Radius method fits.

2. Step 2: Apply the Tan, Tan, Radius method

   Start the command, select the two tangent lines, then enter the radius of 5 units to draw the circle.

3. Final Answer:

   Use Tan, Tan, Radius; select two tangent lines then enter 5 -> Option D

4. Quick Check:

   Tangent lines + radius = Tan, Tan, Radius method [OK]

Hint: Use Tan, Tan, Radius for tangent lines and radius circle [OK]

Common Mistakes:

• Trying Center, Radius without knowing center
• Using 2 Points or 3 Points which ignore tangents
• Forgetting to select both tangent lines