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CHAPTER AT A GLANCE
Lines and Angles
•Unit: Geometry
•Board weightage: Point, line segment, line, ray, angle, comparing angles, types of angles (acute, right, obtuse, straight, reflex) and measuring angles with a protractor give regular 1-mark, 2-mark, 3-mark and 4-mark questions in school examinations (please check your school's latest sample paper)
•Key ideas from the textbook: angle as rotation, superimposition, straight angle and right angle, 360 degrees in a full turn, protractor reading, bisecting an angle by paper folding
•Most scoring part: naming angles correctly with the vertex in the middle, classifying by degree measure, and writing the steps of drawing an angle with a protractor
•Time to revise: about 55 minutes
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