Percussion
The music triangle symbol in musical notation represents a percussion instrument called a triangle. It is used to indicate when a musician should play the triangle in a musical piece. The triangle adds a unique sound and texture to the music, enhancing the overall composition.
Pardon? Its shape is certainly geometrical, usually an equilateral triangle.
because it has an opening on one of its angles
A triangle as in a musical instrument
group (musical), or "musical group"
it was a musical group. ====))))))
Triangle Group - company - was created in 1976.
No, some early musical triangles were isosceles triangles, most modern musical triangles are equilateral.
musical group = band barred = banned
Baskervilles - musical group - was created in 1997.
N.A.S.A. - musical group - was created in 2004.
Pandora - musical group - was created in 1980.