NCERT - 7 - Maths :: Lines and Angles

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Go To: NCERT-Mathematics-Grade 7

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Course Content / Subtopic list:


  1. Related Angles
  2. Pairs Of Lines
  3. Checking For Parallel Lines

Lesson Plan

[Author - Kripa S]

Objective: Introduce different types of angles and lines and their properties

Subtopics to be covered:

- Difference between line and line segment

- Types of Angles -> complementary, supplementary, adjacent, linear pair, vertically opposite, corresponding, alternate, interior, exterior

- Types of lines -> intersecting, parallel, perpendicular, transversal

Learning Outcome:

- Students can identify type of line or angle from a given set

- Students can solve problems to find measure of angles in a given figure



Videos

[Author - Rishi Mazumdar]


https://www.youtube.com/watch?v=MNChwnab8XY (Types of angles)

https://hi.khanacademy.org/math/in-math-by-grade/in-seventh-grade-math/in-seventh-grade-math/lines-angles (Lines and Angles - Hindi)


Images

[Author - Kripa S]


https://static.studyladder.com/cdn/course/19/ce6062a85a2e.jpg (types of lines)

http://study.com/cimages/multimages/16/line_vs._line_segment_.png (line vs line segment)

https://www.skillsyouneed.com/images/geo/corresponding-angle.png (types of angles made by transversal)

https://i.ytimg.com/vi/NxIRHn7tR7I/hqdefault.jpg (corresponding angles)

http://slideplayer.com/18/6186832/big_thumb.jpg (types of angles)

https://image.slidesharecdn.com/6-150119115556-conversion-gate02/95/angle-pairs-complementary-supplementary-adjacent-vertical-linear-pair-9-638.jpg?cb=1421690202 (supplementary, adjacent angles)


Activities

[Author - Kripa S]


1. Share examples of point, line segments from daily life. (example: star, bat, tubelight, side of a fan, bench, door etc)

2. Make 8-10 chits of different types of angles. Hand over one chit to one bench and ask them to enact what angle they are. Eg: If it is an acute angle, the students will stand close to middle student, if it is an obtuse angle, the students will stand far away from the middle student. If it is right angle, the students will stand on his one side and in front to depict 90 deg.

3. Take a ruled sheet of paper. Draw (in thick colour) two parallel lines l and m. Draw a transversal t to the lines l and m. Place a tracing paper over the figure drawn. Trace the lines l, m and t. Slide the tracing paper along t, until l coincides with m. You find that angle '1' on the traced figure coincides with angle '2' of the original figure. Observe and see if there are any other angles that are coinciding. (TB: page 107 activity)


Additional Aids

[Author - Apoorva Khadilkar]


https://drive.google.com/open?id=0B4m07xnDF8JpVTJrNVlldlFPMGc


Transliteration

[Author - Shachi Patel]

Term Transliterated Term Translated Term
line लाइन रेखा
line segment लाइन सेगमेंट रेखा खंड
points पॉइंट्स अंक
angle एंगल कोण
complement कॉम्प्लीमेंट पूरक
supplement सप्लीमेंट परिशिष्ट
adjacent एड्जसंट
linear लीनियर रैखिक
ray रे रे
vertical वर्टीकल खड़ा
opposite अपोजिट सामने
intersect इंटरसेक्ट एक दूसरे को काटना
transversal ट्रांसवर्सल आड़ा
interior इंटीरियर आंतरिक
exterior एक्सटेरियर बाहरी
alternate अलटरनेट वैकल्पिक
parallel पेरेलल समानांतर

Worksheets

[Author - Apoorva Khadilkar]


https://drive.google.com/open?id=0B4m07xnDF8JpQ3RCY3VqcmZZSWc



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