# MHSB - 7 - Maths :: Geometric construction

## Course Content / Subtopic list:

1. Angle Bisector,Perpendicular Bisector Of A Line Segment, Properties Of Angle Dividers Of Triangle
2. Triangle Structure
3. Congruence Of Segment,Angles And Circles

## Lesson Plan

[Contributor - Kripa S]

Objective: To learn to construct triangle, learn about congruence of segments, angles and circles

Subtopics to be covered:

- Perpendicular bisector, angle bisector construction

- Construct when 2 sides and an angle given

- Construct when 2 angles and included side given

- Construct when for a rightangled triangle, one side and hypotenuse given

Learning Oucome:

- Students can construct a triangle based on information given

- Students can identify two congruent line segments, angles and circles

## Videos

[Contributors - Kripa S, Rupa Sarda]

https://www.youtube.com/watch?v=kIcaI3LaOkU (Triangle - Angel Bisector - Marathi)

https://www.youtube.com/watch?v=LVvplYWWzQU (How to construct angle of giving measure - Marathi 1)

https://www.youtube.com/watch?v=k0bc6szSo08 (How to construct angle of giving measure - Marathi 2)

https://www.youtube.com/watch?v=mKXqOklRytQ (How do we Construct a Perpendicular Bisector of a Line Segment? - English)

## Images

[Contributor - Kripa S]

https://i.ytimg.com/vi/yTFfWMCZYK4/maxresdefault.jpg (Geometry Box)

https://upload.wikimedia.org/wikipedia/commons/thumb/3/32/Geom_compass_ruler.png/800px-Geom_compass_ruler.png (how to use a ruler, compass)

http://www.technologystudent.com/images7/obliq3.gif (Use of set squares)

http://www.helpingwithmath.com/images/geometry/angles_measuring11.gif (use of protractor)

## Activities

[Contributor - Kripa S]

1. 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.

2. Make a team of 2-3 students. On student draws a line and other student has to measure, third student will confirm if the measurement is correct. Repeat this step 4-5 times. This way the students can learn how to use the scale

3. Make a team of 2-3 students. On student draws an angle and other student has to measure, third student will confirm if the measurement is correct. Repeat this step 4-5 times. This way the students can learn how to use a protractor

## Transliteration

[Contributor - Satish Kothari]

 Term Transliterated Term Translated Term geometrical constructions जोमेट्रिकल कंस्ट्रक्शंस भौमितिक रचना line लाइन रेषा line segment लाइन सेगमेंट रेषाखंड angle एंगल कोन degrees डिग्रीज अंश bisector बिसेक्टर दुभाजक length लेंग्थ लांबी compass कंपास रेखांकित करण्यासाठी होकायंत्र triangle त्रिंगल त्रिकोण concurrent काँकररेन्ट समवर्ती, एकसंपाती point of concurrence पॉईंट ऑफ काँकररेन्स एकसंपाती interior इंटिरियर आतील बाजू perpendicular परपेंडीकलर काटकोनात असलेला intersect इंटरसेक्ट छेदणे ruler रुलर फूटपट्टी vertices वरटाईसेस शिरोबिंदू distance डिस्टेन्स अंतर incentre इनसेंटर अंतरमध्य circumcentre सर्कमसेंटर परिकेंद्र,परिमध्य equidistant इक्विडिस्टन्ट समतोल right angled राइट एंगल्ड उजव्या कोरीव number नंबर संख्या isosceles triangle आईसोसिलेस ट्राईएंगल समद्विभुज त्रिकोण equilateral triangle ईक्विलाटरल ट्राईएंगल समभुज त्रिकोण scalene triangle स्केलेन ट्राईएंगल विषमभुज त्रिकोण intersection इन्टरसेकशन छेदनबिंदूला identical आयडेनटिकल तंतोतत जुळणारा sum सम बेरीज hypotenuse हायपोटेनस कर्ण arc आर्क कंस, वर्तुळाकार रेषेचा भाग radius, radii रेडिएस त्रिज्या shapes शेप्स आकार trace ट्रेस सावकाश कोरुन काढणे, आराखडा काढणे congruent कॅानगृएन्ट एकरुप transparent ट्रान्सपेरेन्ट पारदर्शक edges एजे्स कडा

## Worksheets

Worksheets [Version 2021]