The word equilateral means equal lines ... An acute-angled triangle has three angles that are all less than 90°. A right-angled triangle has one angle that is exactly 90°.

Equilateral triangle. An equilateral triangle is a ... out an angle in a scalene triangle is if we know the other two angles. Right-angled triangle. A right-angled triangle is a triangle where ...

In the case of a square, it’s possible to mimic the resulting pattern by constructing a series of larger and larger right-angled triangles ... corners of an equilateral triangle, they meet ...