Mathematics & Its Pedagogy
Geometry (Classes VI–VIII)
Mathematics & Pedagogy
Paper II
6 topics
What this chapter covers
The 6 topics below make up Geometry (Classes VI–VIII) in the CTET syllabus. Open any topic for notes, solved examples and a practice MCQ test.
1Basic Geometrical Ideas
2Lines & Angles
3Triangles & Their Properties
4Quadrilaterals & Polygons
5Congruence & Symmetry
6Practical Geometry (Construction)
Study material & tests
📚 Study this chapter
Concept notes, key points, solved examples and hint-guided practice for every topic.
Start learning →
🎯 Topic MCQ tests
8 auto-graded CTET-style questions per topic, with full explanations.
Practice by topic →
📝 Chapter test
25 fresh mixed-difficulty questions, timed, with solutions.
Take chapter test →
Key Concepts — Quick Reference
This chapter
Angle facts you must compute on sight
| Angles on a straight line | add to 180° (linear pair) |
|---|---|
| Angles at a point | add to 360° |
| Complementary angles | add to 90° |
| Supplementary angles | add to 180° |
| Vertically opposite angles | are equal |
| Co-interior (parallel lines) | add to 180°; alternate & corresponding are equal |
Triangle & polygon properties
| Angle sum of a triangle | = 180° |
|---|---|
| Exterior angle of a triangle | = sum of the two opposite interior angles |
| Angle sum of a quadrilateral | = 360° |
| Interior-angle sum of an n-gon | = (n − 2) × 180° |
| Each interior angle of a regular n-gon | = (n − 2) × 180° ÷ n |
| Sum of exterior angles of any polygon | = 360° (one per vertex) |