GCSE Maths Practice: angles
All triangles have angles summing to 180°.
Subtract known angles from 180° to find the missing angle in a triangle.
In any triangle, the sum of the three interior angles is always 180°. This is a fundamental property of triangles and is used to calculate unknown angles. In right triangles, knowing one angle helps determine the other acute angle. In equilateral and isosceles triangles, this property allows calculation of all angles based on symmetry. Understanding triangle angle sums also supports solving problems with polygons, as each polygon can be divided into triangles. Practicing angle calculations in triangles reinforces comprehension of geometric properties, prepares students for exams, and develops spatial reasoning. Applications include architecture, design, navigation, and engineering problems.