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प्रश्न
Calculate the distance between A (7, 3) and B on the x-axis, whose abscissa is 11.
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उत्तर
Here B is (11, 0)
AB = `sqrt((11 − 7)^2 + (0 − 3)^2)`
= `sqrt((4)^2 + (−3)^2)`
= `sqrt(16 + 9)`
= `sqrt(25)`
= 5 units.
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संबंधित प्रश्न
If the point P(x, y) is equidistant from the points A(a + b, b – a) and B(a – b, a + b). Prove that bx = ay.
The value of 'a' for which of the following points A(a, 3), B (2, 1) and C(5, a) a collinear. Hence find the equation of the line.
Find the circumcenter of the triangle whose vertices are (-2, -3), (-1, 0), (7, -6).
Find the value of m if the distance between the points (m , -4) and (3 , 2) is 3`sqrt 5` units.
Find the distance between the origin and the point:
(-5, -12)
Find distance between points O(0, 0) and B(–5, 12).
Case Study -2
A hockey field is the playing surface for the game of hockey. Historically, the game was played on natural turf (grass) but nowadays it is predominantly played on an artificial turf.
It is rectangular in shape - 100 yards by 60 yards. Goals consist of two upright posts placed equidistant from the centre of the backline, joined at the top by a horizontal crossbar. The inner edges of the posts must be 3.66 metres (4 yards) apart, and the lower edge of the crossbar must be 2.14 metres (7 feet) above the ground.
Each team plays with 11 players on the field during the game including the goalie. Positions you might play include -
- Forward: As shown by players A, B, C and D.
- Midfielders: As shown by players E, F and G.
- Fullbacks: As shown by players H, I and J.
- Goalie: As shown by player K.
Using the picture of a hockey field below, answer the questions that follow:
The coordinates of the centroid of ΔEHJ are ______.
The point P(–2, 4) lies on a circle of radius 6 and centre C(3, 5).
If the point A(2, – 4) is equidistant from P(3, 8) and Q(–10, y), find the values of y. Also find distance PQ.
A point (x, y) is at a distance of 5 units from the origin. How many such points lie in the third quadrant?
