# Name the type of quadrilateral formed, if any, by the given points, and give reasons for your answer: (- 1, - 2), (1, 0), (- 1, 2), (- 3, 0) - Mathematics

Name the type of quadrilateral formed, if any, by the given points, and give reasons for your answer: (- 1, - 2), (1, 0), (- 1, 2), (- 3, 0)

#### Solution

Let the points (−1, −2), (1, 0), (−1, 2), and (−3, 0) be representing the vertices A, B, C, and D of the given quadrilateral respectively.

:.AB = sqrt((-1-1)^2+(-2-0)^2) = sqrt((-2)^2+(-2)^2) = sqrt(4+4) = sqrt8 = 2sqrt2

BC = sqrt((1-(-1))^2+(0-2)^2) = sqrt((2)^2+(-2)^2) = sqrt(4+4) = sqrt8 =2sqrt2

CB = sqrt((-1-(-3))^2+(2-0)^2) = sqrt((2)^2+(2)^2) = sqrt(4+4) = sqrt8 = 2sqrt2

AD = sqrt((-1-(3))^2 + (-2-0)^2) = sqrt((2)^2+(-2)^2) = sqrt(4+4) = sqrt8 =  2sqrt2

Diagonal AC =sqrt((-1-(-1))^2+(-2-2)^2) = sqrt(0^2+(-4)^2) = sqrt(16) = 4

Diagonal BD =sqrt((1-(-3))^2+(0-0)^2) = sqrt((4)^2+0^2) = sqrt16 = 4

It can be observed that all sides of this quadrilateral are of the same length and also, the diagonals are of the same length. Therefore, the given points are the vertices of a square.

Concept: Distance Formula
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Chapter 7: Coordinate Geometry - Exercise 7.1 [Page 161]

#### APPEARS IN

NCERT Class 10 Maths
Chapter 7 Coordinate Geometry
Exercise 7.1 | Q 6.1 | Page 161

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