obtuse triangle
obtuse-angled triangle

Empedocles sat down on both sides of his old proctor, form-ing an obtuse triangle with Timmy at the vertex.

If C is an obtuse triangle then it admits exactly one inscribed square.

Many Googie style coffee shops, and other structures, have a roof that appears to be 2/3 of an inverted obtuse triangle.

So there we area nice symbolic obtuse triangle.

This, the field of slaughter, comprised an obtuse triangle whose greatest depth lay along the southern flank, that which was anchored by the mountain wall.

It is an equilateral triangular tiling with each triangle divided into three obtuse triangles (angles 30-30-120) from the center point.

For example, in the question below (Example 104), over one-third of the sample did not accept the obtuse angled triangle as a triangle.

The obtuse isosceles triangle highlighted via the colored lines in the illustration is a golden gnomon.