Measuring the height of a tower

Calculating the height of a classic water tower with a tape measure and lots of sunshine.

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Plotting an angle bisector

In this video, we plot the angle bisector of a given alpha angle.

How to copy an angle

Let’s copy a given alpha convex angle onto ray f with starting...

Reflecting a circle across an axis

Axis t and a circle with centre O and radius r are given on a...

Constructing the perpendicular bisector of a line segment

Let’s construct the perpendicular bisector of a 6-cm-long line...

Weighing the Pythagorean theorem

In this experiment we provide proof of the well-known theorem of...

Plotting parallel lines – Solution I

Let’s plot line g such that it is parallel to line e and passes...

Plotting a 60° angle

To plot a 60° angle, we refer you back to the plotting of an...

Plotting a perpendicular to a line at a given point P on the line

Both line e and point P, which is situated on it, are given. Let’s...

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