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### Course: High school math (India) > Unit 1

Lesson 9: Angles- Angles: introduction
- Concept of angles
- Angles, parallel lines, & transversals
- Angles of a transversal
- Drawing acute, right and obtuse angles
- Types of angles
- Missing angles with a transversal
- Supplementary and complementary angles
- Measuring angles in degrees
- Measurement of angles

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