Day 6: How to construct an equilateral and isosceles triangle without using the polygon tool

Have you ever wondered how to draw an equilateral triangle with geogebra without using the polygon tool? Today we'll learn how to do it.

• How to draw an equilateral triangle
• How to draw an isosceles triangle

Extra work

For those that are finished with the triangle points, here you have some extra exercises:

1. Construct a triangle of sides 5, 7 and 3 cm with geogebra. Explain below how did you managed it.
2. Construct an acute triangle with two sides of 5 and 7 cm and an angle of 30º.
3. Construct a right triangle with sides 4 and 3 cm. What is the length of the hyphotenuse?
4. Construct an obtuse triangle with a side of 4 cm and an angle of 135º.

Day 5: Incenter and centroid with geogebra

After you finish your constructions, you should send the .ggb files altogether in a mail to the teacher.

Day 3: Triangle centers

Today we're going to study the different triangle centers: centroid, incenter, circumcenter and orthocenter. I'm sure you studied them before. Are you able to remember them?

Links

• Triangle centers  (maths is fun)
• Triangle centers (geogebra tube)

Activity

Now that you have read about triangle centers, try to do the following activities.

Day 2: Triangles with geogebra

You already know that we can classify the triangles acording to their angles and acording to their side lengths. Read this link if you want to know more.

Activity

1.  Open geogebra and draw in the same canvas the following triangles:
• Equilateral triangle
• Isosceles triangle
• Scalene triangle
• Save the .ggb file
2.  Open another geogebra file and try to draw the following triangles:
• Acute triangle
• Obtuse triangle
• Right triangle
• Save the .ggb file
3. Questions:
1. Draw here a short definition for each kind of triangle according to their side lengths.
2. In the second file, use then the angle utility of geogebra and measure each angle. How much is the sum of the 3 angles of a triangle?
4. Send an email to the teacher with the two .ggb files attached and the answer to the questions.