Exercise 3.4 | Ch 3 Understanding Quadrilateral | Class 8 Maths RBSE NCERT New Syllabus 2024-25

EXERCISE 3.4 1. State whether True or False. (a) All rectangles are squares (e) All kites are rhombuses. (b) All rhombuses are parallelograms (f) All rhombuses are kites. (c) All squares are rhombuses and also rectangles (g) All parallelograms are trapeziums. (d) All squares are not parallelograms. (h) All squares are trapeziums. 2. Identify all the quadrilaterals that have. (a) four sides of equal length (b) four right angles 3. Explain how a square is. (i) a quadrilateral (ii) a parallelogram (iii) a rhombus (iv) a rectangle 4. Name the quadrilaterals whose diagonals. (i) bisect each other (ii) are perpendicular bisectors of each other (iii) are equal 5. Explain why a rectangle is a convex quadrilateral. 6. ABC is a right-angled triangle and O is the mid point of the side opposite to the right angle. Explain why O is equidistant from A, B and C. (The dotted lines are drawn additionally to help you). निष्कासन 3.4 1. राज्य चाहे वह सच हो या गलत। (ए) सभी आयताकार वर्ग हैं (ई) सभी पतंग rhombuse हैं। (b) सभी rhombuses समानांतर चतुर्भुज हैं (f) सभी rhombuses पतंग हैं। (c) सभी वर्ग rhombuses हैं और आयताकार भी हैं (g) सभी समांतर चतुर्भुज ट्रेपेज़ियम हैं। (d) सभी वर्ग समांतर चतुर्भुज नहीं हैं। (ज) सभी वर्ग ट्रेपेज़ियम हैं। 2. उन सभी चतुर्भुजों की पहचान करें, जिनके पास है। (ए) बराबर लंबाई के चार पक्ष (बी) चार समकोण 3. बताइए कि एक वर्ग कैसा है। (i) एक चतुर्भुज (ii) एक समांतर चतुर्भुज (iii) एक समभुज (iv) एक आयत 4. उन चतुर्भुजों का नाम बताइए जिनके विकर्ण हैं। (i) एक दूसरे को द्विभाजित करते हैं (ii) एक दूसरे के लंबवत द्विभाजक हैं (iii) बराबर हैं 5. बताइए कि एक आयत एक उत्तल चतुर्भुज क्यों है। 6. ABC एक समकोण त्रिभुज है और O समकोण के विपरीत भुजा का मध्य बिंदु है। बताइए कि O A, B और C. से समतुल्य क्यों है (बिंदीदार रेखाएं अतिरिक्त रूप से आपकी सहायता के लिए खींची गई हैं)।

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