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![[Class 7] In the figures below, what angles do x and y stand for - Figure it out - Page 123, 124, 125](https://cdn.teachoo.com/aa9e6052-fd89-4090-916a-6f275014f512/slide88.jpg)
Question 3 (a) - Figure it out - Page 123, 124, 125 - Chapter 5 Class 7 - Parallel and Intersecting Lines (Ganita Prakash)
Last updated at July 24, 2025 by Teachoo
Class 7 (Ganita Prakash & Old NCERT)
Chapter 5 Class 7 - Parallel and Intersecting Lines (Ganita Prakash)
- Intersecting Lines
- Parallel and Perpendicular lines
- Between lines
- Parallel and Perpendicular lines in Paper Folding
- Figure it out - Page 113, 114
- Transversals
- Corresponding Angles
- Alternate Angles
- Interior angle on Same side of Transversal
- Drawing Parallel Lines
- Parallel Illusions
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Figure it out - Page 123, 124, 125
Transcript
Question 3 (a) In the figures below, what angles do x and y stand for? First of all, angle marked 65° is corrected in the figure In NCERT Book, the marking is wrong Now, from parallel red lines and blue transversal By alternate interior angles are equal ∠ y = Red angle Since ∠ x = Green angle ∠ x = 25° Now, On Red line, we do linear pair Red angle + Green angle = 180° Red angle + 25° = 180° Red angle = 180° – 25° Red angle = 155° Also, ∠ y = Red angle ∠ y = 155° And, vertically opposite angles are also equal ∠ x = Green angle Now, taking red lines as parallel and yellow line as transversal The 90° angle and (65° + green angle) are corresponding angles So, they must be equal 90° = 65° + Green Angle 90° – 65° = Green angle 25° = Green angle Green angle = 25°
