Welcome to today's class. Lines and Angles - Lesson 3 Learning outcomes : identify the given pair of lines as parallel or intersecting identify a transversal generalize the relationship between the angles formed by a pair of parallel lines Intersecting Lines : When two or more lines cross each other in a plane, they are called intersecting lines. Point of intersection. The intersecting lines share a common point, which exists on all the intersecting lines, and is called the point of intersection. Here, lines P and Q intersect at point O, which is the point of intersection. (a)Are all perpendicular lines intersecting lines ? Yes (b)Are all intersecting lines perpendicular ? No Do Try These - Page 104 Transversal A transversal is a line that passes through two lines in the same plane at two distinct points. Do Try These Page 105 How many transversals can you draw to two given lines? The an...
GOOD MORNING BOYS! Today by the end of the blog, you will be able to: (i) Relate the angles as LINEAR PAIRS AND VERTICALLY OPPOSITE ANGLES. RELATED ANGLES: Linear pair: A linear pair is a pair of adjacent angles whose non-common sides are opposite rays. In the figure, pair of linear pairs are: ∠1 and ∠5 ∠2, ∠3 and ∠4 THE SUM OF LINEAR PAIRS = 180° Vertically Opposite Angles: W hen two lines intersect, the vertically opposite angles so formed are equal. IN THE FIGURE ON THE LEFT, THE BLUE ANGLES ARE EQUAL. EXERCISE 5.1 EXAMPLE 1: Find the angle x when two of the angles is given. Question 11: Think of the reason yourself. Question 12: Part (ii) is done for you. [Try part (i) yourself.] HOMEWORK: 1. Complete the Ex 5.1 given the blog. 2. Do Question 13 and 14 Ex 5.1 THIS IS ALL FOR TODAY!! ...
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