A regular polygon has sides that are equal in length and equal angles. These shapes are all regular polygons. A regular triangle is called an equilateral triangle. A regular quadrilateral is ...

This evening and the early parts of the night will see dry conditions and cloudy skies. In the second half of the night, thicker cloud will build in, bringing spells of rain and windy conditions ...

Angles in triangles Learn how to calculate angles in triangles. Calculating angles around a point Learn how to identify and measure angles.

# User has to enter the angles of the triangle in degrees.