Obtuse-angled triangle and Trigon

Obtuse-angled triangle noun - A triangle that contains an obtuse interior angle.

Trigon and obtuse-angled triangle are semantically related. In some cases you can use "Trigon" instead a noun phrase "Obtuse-angled triangle".

Trigon noun - A triangular lyre of ancient Greece and Rome.

Obtuse-angled triangle and trigon are semantically related. Sometimes you can replace phrase "Obtuse-angled triangle" with "Trigon", this terms are similar.