"Acute-Angled" is a word in ENGLISH

An obtuse-angled figure, esp. and obtuse-angled triangle.

Containing or having two right angles; as, a birectangular spherical triangle.

One line or radius falling perpendicularly on another; as, the catheti of a right-angled triangle, that is, the two sides …

A solid of the form described by the revolution of a right-angled triangle about one of the sides adjacent to …

A proposition in which, after a conclusion from something supposed has been drawn, the order is inverted, making the conclusion …

The side of a right-angled triangle that is opposite to the right angle.

Making a right angle; perpendicular, as two lines or two sides of a triangle, which include a right angle.

Having oblique angles; as, an oblique-angled triangle.

Having an obtuse angle; as, an obtuse-angled triangle.

That point in which the three perpendiculars let fall from the angles of a triangle upon the opposite sides, or …

A triangle having three acute angles.

The motion of a point, line, or surface about a point or line as its center or axis, in such …

Containing a right angle or right angles; as, a right-angled triangle.

A triangle having its sides and angles unequal.

Having the sides and angles unequal; -- said of a triangle.

Having, or being in, a contrary order; -- said of a section of an oblique cone having a circular base …

To extend under, or be opposed to; as, the line of a triangle which subtends the right angle; the chord …

A draughtsman's square in the form of a right-angled triangle.

An instrument of percussion, usually made of a rod of steel, bent into the form of a triangle, open at …

A figure bounded by three lines, and containing three angles.