1
NDA Mathematics 14 November 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language

Direction: Consider the following for the next two (02) items that follow.

A circle is passing through the points (5, -8), (-2, 9) and (2, 1).

What are the coordinates of the center of the circle?
A
(-2, -50)
B
(-50, -20)
C
(-24, -58)
D
(-58, -24)
2
NDA Mathematics 14 November 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language

Direction: Consider the following for the next two (02) items that follow.

A circle is passing through the points (5, -8), (-2, 9) and (2, 1).

If r is the radius of the circle, then which one of the following is correct?
A
r < 10
B
10 < r < 30
C
30 < r < 60
D
r > 60
3
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
What is the radius of the circle 4x2 + 4y2 - 20x + 12y - 15 = 0?
A
14 units
B
10.5 units
C
7 units
D
3.5 units
4
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
A chord subtends an angle 120° at the centre of a unit circle. What is the length of the chord?
A
√2 - 1 units
B
√3 - 1 units
C
√2 units
D
√3 units
EXAM MAP