Difference between revisions of "APSB - 7 - Maths :: Construction of triangles"
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=Activities= | =Activities= | ||
| + | [Contributor - Aasma Ahmad] | ||
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| + | 1. Ask students to identify for which of the following measurements a triangle cannot be drawn and why? | ||
| + | |||
| + | # Construct ΔABC in which AB = 4 cm, BC = 5cm and ∠B +∠A = 130°. | ||
| + | |||
| + | # Construct ΔMAN with MA = 4 cm, ∠M +∠N = 80° and ∠A = 100°. | ||
| + | |||
| + | # Construct ΔPQR such that QR = 6 cm, ∠Q =∠R = 90°. | ||
| + | |||
| + | # Construct ΔABC, ∠B +∠C = 90, and BC = 6 cm; AB = 5 cm. | ||
| + | |||
| + | 2. Divide class into 2 teams. Ask both the teams to give measurements to the other team in the following form, on the basis of which triangles can be drawn - | ||
| + | # Three sides of the triangle. | ||
| + | # Two sides and the angle included between them. | ||
| + | # Two angles and the side included between them | ||
| + | # Hypotenuse and one adjacent side of a right-angled triangle. | ||
=Additional Aids= | =Additional Aids= | ||
Revision as of 04:33, 16 November 2017
Go To: APSB-Mathematics-Grade 7
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[Author - Kripa S]
Objective: To learn how to contruct a triangle with given data
Subtopics to be covered:
- Construct when 3 sides given
- 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 Outcome:
- Students can construct a triangle based on information given
[Author - Kripa S]
http://scert.telangana.gov.in/sites/default/files/publication/ebooks/7TM_MAT.pdf#page=190 (Telangana Board) (Telugu Medium)
http://apscert.gov.in/ebookapp/GeneratePdf (AP Board) (Telugu Medium)
http://scert.telangana.gov.in/sites/default/files/publication/ebooks/7EM_MAT.pdf#page=190 (Telangana Board) (English Medium)
http://apscert.gov.in/ebookapp/GeneratePdf (AP Board) (English Medium)
[Author - Kripa S]
http://www.mstworkbooks.co.za/mathematics/gr8/Maths_English_LG_gr8_term2-web-resources/image/60578.png (use of compass in constructing triangle)
https://my.homecampus.com.sg/images/notes/drawing_triangles_equilateral_step3.png (use of protractor to construct triangle)
http://pad1.whstatic.com/images/thumb/4/43/Construct-an-Isosceles-Triangle-Step-5.jpg/aid3190797-v4-728px-Construct-an-Isosceles-Triangle-Step-5.jpg (use of scale to construct triangle)
[Contributor - Aasma Ahmad]
1. Ask students to identify for which of the following measurements a triangle cannot be drawn and why?
- Construct ΔABC in which AB = 4 cm, BC = 5cm and ∠B +∠A = 130°.
- Construct ΔMAN with MA = 4 cm, ∠M +∠N = 80° and ∠A = 100°.
- Construct ΔPQR such that QR = 6 cm, ∠Q =∠R = 90°.
- Construct ΔABC, ∠B +∠C = 90, and BC = 6 cm; AB = 5 cm.
2. Divide class into 2 teams. Ask both the teams to give measurements to the other team in the following form, on the basis of which triangles can be drawn -
- Three sides of the triangle.
- Two sides and the angle included between them.
- Two angles and the side included between them
- Hypotenuse and one adjacent side of a right-angled triangle.
[Contributor - Meghana Bommireddy]
https://drive.google.com/open?id=0BzNF2YyqQxJ-T1FubHpLTm5DMnc
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