Magnetic board instrument for building triangles and Tales' theorem

MACHINE TRANSLATION (not authorised yet)

Magnetic array instrument for building triangles, presenting and calculating the height and field of triangles, presenting and measuring angles and demonstrating Tales and Pythagoras laws. The instrument can also be used as a numerical axis and a quarter of a coordinate system. It is magnetic and large, so it is visible at school from any place in the classroom.

The device is made of colourful plexiglas with engraved (and therefore non-abrasive) points and units. It consists of connected main arms, each 65 cm long, two auxiliary arms, each 60 cm long, and a 0-90 degree angle meter. All arms of the instrument are glued with magnetic tape. The whole set is placed in a convenient cover with a handle.

The set enables presentation and explanation in mathematics lessons of such issues as: types of angles (straight, concave, sharp, open, half-full, full, adjacent angles, apex angles), measuring angles, types of triangles (equilateral, isosceles, rectangular, rectangular, rectangular), construction of the triangle (height, base, field), Tales' theorem, Pythagoras' theorem.

The teaching aid is convenient to use, easy to store and magnetic. We recommend.