زوايا المثلث- angles of a tiangle للصف السادس

ØPolygon – a closed many straight-sided figure.

ØAngle – two rays that meet at a common end point.

ØDegree – a unit of measurement of an angle or arc, represented by the symbol º.

Triangle – a polygon with 3 angles and 3 straight sides

ØThe sum of all the angles equals 180º degrees.