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Statement 1: The number of common tangen...

Statement 1`:` The number of common tangents to the circles `x^(2) + y^(2) =4 ` and `x^(2) + y^(2) -6x - 6y = 24` is 3.
Statement 2 `:` If two circles touch each other externally thenit has two direct common tangents and one indirect common tangent.

A

Statement-1 is true, Statement-2 is false

B

Statement-1 : is True, Statement-2 is True and Statement-2 is a correct explanation for Statement-1

C

Statement-1 is True, Statement-2 is True and Statement-2 is NOT a correct explanation for Statement -1

D

Statement-1 is False, Statement-2 is True

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The correct Answer is:
To analyze the given statements about the circles, we will first determine the properties of the circles involved and then verify the statements step by step. ### Step 1: Identify the circles The first circle is given by the equation: \[ x^2 + y^2 = 4 \] This can be rewritten to identify its center and radius: - Center \( C_1 = (0, 0) \) - Radius \( r_1 = \sqrt{4} = 2 \) The second circle is given by the equation: \[ x^2 + y^2 - 6x - 6y = 24 \] We can rearrange this into standard form by completing the square: \[ (x^2 - 6x) + (y^2 - 6y) = 24 \] Completing the square: \[ (x - 3)^2 - 9 + (y - 3)^2 - 9 = 24 \] \[ (x - 3)^2 + (y - 3)^2 = 24 + 18 = 42 \] Thus, we have: - Center \( C_2 = (3, 3) \) - Radius \( r_2 = \sqrt{42} \approx 6.48 \) ### Step 2: Calculate the distance between the centers The distance \( d \) between the centers \( C_1 \) and \( C_2 \) is calculated using the distance formula: \[ d = \sqrt{(3 - 0)^2 + (3 - 0)^2} = \sqrt{3^2 + 3^2} = \sqrt{9 + 9} = \sqrt{18} = 3\sqrt{2} \approx 4.24 \] ### Step 3: Analyze the relationship between the circles We need to compare the distance \( d \) with the sum and difference of the radii to determine the number of common tangents. 1. **Sum of the radii**: \[ r_1 + r_2 = 2 + \sqrt{42} \approx 2 + 6.48 = 8.48 \] 2. **Difference of the radii**: \[ r_2 - r_1 = \sqrt{42} - 2 \approx 6.48 - 2 = 4.48 \] ### Step 4: Determine the number of common tangents Now we compare \( d \) with \( r_1 + r_2 \) and \( |r_2 - r_1| \): - Since \( d \approx 4.24 < 8.48 \) (the sum of the radii), the circles are not separate. - Since \( d \approx 4.24 < 4.48 \) (the difference of the radii), one circle lies inside the other. ### Conclusion Since one circle lies inside the other and they do not touch, there are no common tangents between the two circles. ### Verification of Statements - **Statement 1**: The number of common tangents to the circles is **not 3**. This statement is **false**. - **Statement 2**: If two circles touch each other externally, they have two direct common tangents and one indirect common tangent. This statement is **true**. ### Final Answer - Statement 1 is false. - Statement 2 is true.
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VMC MODULES ENGLISH-CIRCLES-LEVEL-1
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  3. Statement 1: The number of common tangents to the circles x^(2) + y^(2...

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  4. The number of common tangents of the circles x^(2) +y^(2) =16 and x^(2...

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  5. Show that the common tangents to the circles x^(2)+y^(2)-6x=0andx^(2)+...

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  7. Two vertices of an equilateral triangle are (-1,0) and (1, 0), and its...

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  8. If the line y = mx - (m-1) cuts the circle x^2+y^2=4 at two real and d...

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  9. The equation of the circle of radius 2sqrt(2) whose centre lies on the...

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