M1-5-37

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Sum angles in triangle Maths Geometry
Angles.jpg

Overview:

The sum of the angles in a triangle is always 180°.

You may:

  • Move the vertices of the triangle with the mouse
  • See the values of the angles with up to 5 decimal places


Suggestions:

Explain the figure.

Check that the sum is always 180º no matter the precision of the measurement.

Try to design these triangles as well: rectangular, equilateral, etc.

Is it harder to do when you increase the number of decimal places? Why?


Learning object available in:

EN
DE
IT
LT
ES
CA


Terms you need to know:

Sizes of the interior angles
Decimals



Additional information:

type: interactive animation
format: java
Permission to(1):
download: yes
modify: no?
Further permissions:
http://www.walter-fendt.de/ph14/copyrightphe.htm
Age group(2): 5-12


Notes

(1) For personal, non-commercial use. To read the complete "Terms of use" of this learning object, please follow the link given in "Further permissions".

(2) Suggested age group. The learning object may be used by the Teachers with students of any age.

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