In this app the questions are carefully graded from easy up to difficult in 29 steps.
BasicsTap the smallest angleTap the acute/obtuse/reflex angleUse letters to name an angle
Theorems:Angles on a lineAngles at a pointVertically opposite anglesAngle sum triangleExterior angle of a triangle
Solve problems:Single step problems, stating the theoremMulti step problemsProblems using simple algebra
A tutor screen
A worked example