Perpendicular line Construction

Aim:Divide a line in half at 90º

Perpendicular Bisector

Perpendicular Line from a point NEAR a line

PP

P

Perpendicular Line from a point ON a line

Perpendicular Bisector A

Step1

Aim: Divide a line in half at 90º

Click to start

Rule a line

(leaving some space on each side of the line)

Home

Perpendicular Bisector A

Compass point

Set your compass to

about ¾ of the line length

Step1

Aim: Divide a line in half at 90º

Home

Perpendicular Bisector

Compass point

Set your compass to

about ¾ of the line length

Step1

Aim: Divide a line in half at 90º

Home

Perpendicular Bisector

Compass point

Set your compass to

about ¾ of the line length

Step1

Aim: Divide a line in half at 90º

Home

Perpendicular Bisector

Compass point Arc into space

each side of the line

Step1

Aim: Divide a line in half at 90º

Home

Perpendicular Bisector

Compass point Arc into space

each side of the line

Step1

Aim: Divide a line in half at 90º

Home

Perpendicular Bisector

Compass point Arc into space

each side of the line

Step1

Aim: Divide a line in half at 90º

Home

Perpendicular Bisector

Compass point Arc into space

each side of the line

Step1

Aim: Divide a line in half at 90º

Home

Perpendicular Bisector

Compass point Arc into space

each side of the line

Step1

Aim: Divide a line in half at 90º

Home

Perpendicular Bisector B

Compass point

Arc into space each side of

the line

Step1 Step2

Aim: Divide a line in half at 90º

Keep the compass the

same

Home

Perpendicular Bisector

Compass point

Arc into space each side of

the line

Step1 Step2

Aim: Divide a line in half at 90º

Keep the compass the

same

Home

Perpendicular Bisector

Compass point

Arc into space each side of

the line

Step1 Step2

Aim: Divide a line in half at 90º

Keep the compass the

same

Home

Perpendicular Bisector

Compass point

Arc into space each side of

the line

Step1 Step2

Aim: Divide a line in half at 90º

Home

Aim: Divide a line in half at 90º

Perpendicular Bisector C

With this point

Use a ruler to join this point

1 2 3 4 5 6 7 8 9 10 11 12 0

0

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

11

11

12

12

Step1 Step2 Step3 Home

Perpendicular Bisector

Aim: Divide a line in half at 90º

And half way

This should be 90º

90º

1

2

1

2

Perpendicular bisector

Step1 Step2 Step3 The End Circumcircle Home

Circumcircle Do the Perpendicular Bisectors of the sides of a triangle meet at one point?

This?

Step1 Step2 Step3 The End Circumcircle Home

Circumcircle Do the Perpendicular Bisectors of the sides of a triangle meet at one point?

OR This?

Step1 Step2 Step3 The End Circumcircle Home

Circumcircle Do the Perpendicular Bisectors of the sides of a triangle meet at one point?

Step1 Step2 Step3 The End Circumcircle Home

Perpendicular Line from a Point A

Aim: Construct a line at 90º through a point near a line

P

Step1

Rule a line

Mark a point near the line (about 4cm away is fine)

Leave some space on either side of the line

Click to start

Home

Perpendicular Line from a Point A

Compass point

Set your compass to reach over the line so the arc will cut twice

Aim: Construct a line at 90º through a point near a line

P

Step1 Home

Perpendicular Line from a Point

Compass point

Set your compass to reach over the line so the arc will cut twice

Aim: Construct a line at 90º through a point near a line

P

Step1 Home

Perpendicular Line from a Point

Compass point

Aim: Construct a line at 90º through a point near a line

P

Move your compass to one side

Step1 Home

Perpendicular Line from a Point

Compass point

Aim: Construct a line at 90º through a point near a line

P

Step1 Home

Perpendicular Line from a Point

Compass point

Aim: Construct a line at 90º through a point near a line

P

Step1 Home

Perpendicular Line from a Point

Compass point

Aim: Construct a line at 90º through a point near a line

P

Step1 Home

Perpendicular Line from a Point B

Aim: Construct a line at 90º through a point near a line

P

Step1 Step2 Home

P

Perpendicular Line from a Point

Aim: Construct a line at 90º through a point near a line

Keep the compass the

same

Step1 Step2 Home

P

Perpendicular Line from a Point

Compass point Arc into space

each side of the line

Aim: Construct a line at 90º through a point near a line

Keep the compass the

same

Step1 Step2 Home

P

Perpendicular Line from a Point

Compass point Arc into space

each side of the line

Aim: Construct a line at 90º through a point near a line

Keep the compass the

same

Step1 Step2 Home

P

Perpendicular Line from a Point

Compass point Arc into space

each side of the line

Aim: Construct a line at 90º through a point near a line

Step1 Step2 Home

P

Perpendicular Line from a Point

Compass point Arc into space

each side of the line

Aim: Construct a line at 90º through a point near a line

Step1 Step2 Home

P

Perpendicular Line from a Point

Compass point Arc into space

each side of the line

Aim: Construct a line at 90º through a point near a line

Step1 Step2 Home

P

Perpendicular Line from a Point C

Compass point

Arc into space each side of

the line

Keep the compass the

same

Aim: Construct a line at 90º through a point near a line

Step1 Step2 Step3 Home

P

Perpendicular Line from a Point

Compass point

Arc into space each side of

the line

Keep the compass the

same

Aim: Construct a line at 90º through a point near a line

Step1 Step2 Step3 Home

P

Perpendicular Line from a Point

Compass point

Arc into space each side of

the line

Keep the compass the

same

Aim: Construct a line at 90º through a point near a line

Step1 Step2 Step3 Home

P

Perpendicular Line from a Point

Compass point

Arc into space each side of

the line

Aim: Construct a line at 90º through a point near a line

Step1 Step2 Step3 Home

P

Perpendicular Line from a Point D

With this point

Use a ruler to join this point

1 2 3 4 5 6 7 8 9 10 11 12 0

0

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

11

11

12

12

Aim: Construct a line at 90º through a point near a line

Step1 Step2 Step3 Home

P

Perpendicular Line from a Point

This should be 90º

90º

Perpendicular Line

Step1 Step2 Step3 The End

Aim: Construct a line at 90º through a point near a line

Home

Perpendicular Line from a Point A

Aim: Construct a line at 90º through a point on a line

P

Step1

Click to start

Rule a line

Mark a point on the line (not in the middle)

Leave some space on either side of the line

Home

Perpendicular Line from a Point A

Compass point

Aim: Construct a line at 90º through a point on a line

P

Mark an arc on both sides of

point P

Step1 Home

Perpendicular Line from a Point A

Compass point

Aim: Construct a line at 90º through a point on a line

P

Mark an arc on both sides of

point P

Step1 Home

Perpendicular Line from a Point A

Compass point

Aim: Construct a line at 90º through a point on a line

P

Mark an arc on both sides of

point P

Step1 Home

Perpendicular Line from a Point A

Compass point

Aim: Construct a line at 90º through a point on a line

P

Mark an arc on both sides of

point P

Step1 Home

Perpendicular Line from a Point A

Compass point

Aim: Construct a line at 90º through a point on a line

P

Mark an arc on both sides of

point P

Step1 Home

Perpendicular Line from a Point A

Compass point

Aim: Construct a line at 90º through a point on a line

P

Mark an arc on both sides of

point P

Step1 Home

Perpendicular Line from a Point

Compass point

Set compass to ¾ the length of the arc

Aim: Construct a line at 90º through a point on a line

P

Step1 Step2 Home

Perpendicular Line from a Point

Compass point

Set compass to ¾ the length of the arc

Aim: Construct a line at 90º through a point on a line

P

Step1 Step2 Home

P

Perpendicular Line from a Point

Compass point Arc into space

each side of the line

Aim: Construct a line at 90º through a point on a line

Keep the compass the

same

Step1 Step2 Home

P

Perpendicular Line from a Point

Compass point Arc into space

each side of the line

Aim: Construct a line at 90º through a point on a line

Keep the compass the

same

Step1 Step2 Home

P

Perpendicular Line from a Point

Compass point Arc into space

each side of the line

Aim: Construct a line at 90º through a point on a line

Keep the compass the

same

Step1 Step2 Home

P

Perpendicular Line from a Point

Compass point Arc into space

each side of the line

Aim: Construct a line at 90º through a point on a line

Keep the compass the

same

Step1 Step2 Home

P

Perpendicular Line from a Point

Compass point Arc into space

each side of the line

Aim: Construct a line at 90º through a point on a line

Keep the compass the

same

Step1 Step2 Home

P

Perpendicular Line from a Point C

Compass point

Arc into space each side of

the line

Aim: Construct a line at 90º through a point on a line

Keep the compass the

same

Step1 Step2 Step3 Home

P

Perpendicular Line from a Point

Compass point

Arc into space each side of

the line

Aim: Construct a line at 90º through a point on a line

Keep the compass the

same

Step1 Step2 Step3 Home

P

Perpendicular Line from a Point

Compass point

Arc into space each side of

the line

Aim: Construct a line at 90º through a point on a line

Keep the compass the

same

Step1 Step2 Step3 Home

P

Perpendicular Line from a Point

Compass point

Arc into space each side of

the line

Aim: Construct a line at 90º through a point on a line

Step1 Step2 Step3 Home

P

Perpendicular Line from a Point D

With this point

Use a ruler to join this point

1 2 3 4 5 6 7 8 9 10 11 12 0

0

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

11

11

12

12

Aim: Construct a line at 90º through a point on a line

Step1 Step2 Step3 Home

PP

Perpendicular Line from a Point

This should be 90º

90º

Perpendicular Line

Step1 Step2 Step3 The End

Aim: Construct a line at 90º through a point on a line

Home