Angles in triangles All triangles have internal angles that add up to 180°, no matter the type of triangle.

A simple guide on how to show the angles in triangle add up to 180 degrees, aimed at students aged 11 to 14.

5. Use right-angle triangle trigonometry (e.g., SOH-CAH-TOA) to measure your desired angle. 3. Smartphone Apps Many smartphone apps have been developed that can measure angles using the built-in ...

KS3 maths curriculum area Geometry and measures: Derive and use the sum of angles in a triangle and use it to deduce the angle sum in any polygon, and to derive properties of regular polygons David ...

Get them exploring this important method for solving triangles, says Colin Foster… In this maths lesson, students will explore how the sine rule allows possible triangles to be solved, given ...

With two angles and one side of a triangle, trigonometry reveals the lengths of the other sides, and thereby, the height of the triangle (the mountain).