Chapter 15 आलेखों से परिचय Ex 15.2

प्रश्न 1.
निम्न बिन्दुओं को एक वर्गांकित कागज (Graph sheet) or sifona ariffiny zit Hilferu fata QRIT वे सभी एक सरल रेखा पर स्थित हैं?

  1. A (4, 0), B (4, 2), C (4, 6), D (4, 2.5)
  2. P(1, 1), Q (2, 2), R (3, 3), S (4, 4)
  3. K (2, 3), L (5, 3), M (5, 5), N (2, 5)

हल:
1.


यहाँ सभी बिन्दु एक सरल रेखा पर स्थित हैं।

हल:
2.
MP Board Class 8th Maths Solutions Chapter 15 आलेखों से परिचय Ex 15.2 img-2
यहाँ सभी बिन्दु एक सरल रेखा पर स्थित हैं।

हल:
3.

यहाँ सभी बिन्दु एक सरल रेखा पर स्थित नहीं हैं।

प्रश्न 2.
बिन्दुओं (2, 3) तथा (3, 2) में से गुजरती हुई एक सरल रेखा खींचिए। उन बिन्दुओं के निर्देशांक लिखिए जिन पर यह रेखा X – अक्ष तथा Y – अक्ष को प्रतिच्छेद करती हैं।
हल:
MP Board Class 8th Maths Solutions Chapter 15 आलेखों से परिचय Ex 15.2 img-4
यहाँ, सरल रेखा X – अक्ष को R (5, 0) और Y – अक्ष को S (0, 5) पर प्रतिच्छेद करती है।

प्रश्न 3.
आलेख में बनाई गई आकृतियों में प्रत्येक के शीर्षों के निर्देशांक लिखिए –

हल:
बिन्दुओं के निर्देशांक:

  1. O (0,0), A (2,0), B (2, 3),C (0, 3)
  2. P (4, 3), Q (6, 1), R (6, 5), S (4, 7)
  3. K (10,5), L (7, 7), M (10,8)

प्रश्न 4.
निम्न कथनों में कौन-सा सत्य है तथा कौन-सा असत्य? असत्य को ठीक कीजिए।

  1. कोई बिन्दु जिसका X – निर्देशांक शून्य है तथा Y – निर्देशांक शून्येतर है, Y – अक्ष पर स्थित होगा।
  2. कोई बिन्दु जिसका Y – निर्देशांक शून्य है तथा X – निर्देशांक 5 है, Y – अक्ष पर स्थित होगा।
  3. मूलबिन्दु के निर्देशांक (0, 0) हैं।

उत्तर:

  1. सत्य
  2. असत्य, X-अक्ष पर स्थित होगा।
  3. सत्य।
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