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Maths Measuring Space: Perimeter and Area Class 9 (Ganita Manjari) Assertion and Reason Questions

Assertion Reasoning Quiz · Class 9 · Maths · CBSE

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Chapter 6 Class 9 - Measuring Space: Perimeter and Area (Ganita Manjar | 6 questions | about 5 minutes

Practise Measuring Space: Perimeter and Area Class 9 (Ganita Manjari) with Teachoo's Assertion Reasoning Quiz (Class 9 · Maths · CBSE). Practise these questions in a free interactive quiz with answer feedback.

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Question 1 of 6
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Question 1 of 6
Assertion: In the same circle, an arc subtending \(120^\circ\) at the centre is twice as long as an arc subtending \(60^\circ\).
Reason: The length of an arc of radius \(r\) and central angle \(\theta\) is \[l=2\pi r\times\frac{\theta}{360^\circ}.\]
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Question 2 of 6
Assertion: If the radii of two circles are in the ratio \(5:4\), their areas are in the ratio \(25:16\).
Reason: The circumferences of the two circles are in the ratio \(25:16\).
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Question 3 of 6
Assertion: Brahmagupta’s formula is a generalisation of Heron’s formula.
Reason: Every rectangle is a cyclic quadrilateral.
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Question 4 of 6
Assertion: Two parallelograms having the same pair of adjacent side lengths must have equal areas.
Reason: The area of a parallelogram is the product of a base and its corresponding perpendicular height.
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Question 5 of 6
Assertion (A):
If all three sides of a triangle are doubled in length, the area of the newly formed triangle becomes exactly four times the original area.
Reason (R):
Area is a two-dimensional measure; therefore, the ratio of the areas of two similar triangles equals the square of the ratio of their corresponding sides.
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Question 6 of 6
Assertion: A median of a triangle divides the triangle into two triangles having equal areas.
Reason: The two triangles formed have equal bases and the same perpendicular height.
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