MCQ
The three points $(-2,2), \,(8,-2)$ and $(-4, -3)$ are the vertices of
  • A
    An isosceles triangle
  • B
    An equilateral triangle
  • A right angled triangle
  • D
    None of these

Answer

Correct option: C.
A right angled triangle
c
(c) $a = \sqrt {{{(8 + 2)}^2} + {{( - 2 - 2)}^2}} = \sqrt {116} $

$b = \sqrt {{{( - \,4 - \,8)}^2} + {{( - \,3 + 2)}^2}} = \sqrt {145} $

$c = \sqrt {{{( - \,4 + 2)}^2} + {{( - \,3 - 2)}^2}} = \sqrt {29} $

$ \Rightarrow \,\,{a^2} + {c^2} = {b^2}$

Hence it is right angled triangle.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The sum of the series $\sum_{n=1}^{\infty} \frac{n^{2}+6 n+10}{(2 n+1) !}$ is equal to :
Find the principal value of $cosec ^{-1}(-\sqrt{2})$
Let $N$ denote the set of all natural numbers. Define two binary relations on $N$ as $R_1 = \{(x,y) \in  N \times  N : 2x + y= 10\}$ and $R_2 = \{(x,y) \in  N\times  N : x+ 2y= 10\} $. Then
The value of the definite integral $\int\limits_{19}^{37} {\left( {{{\{ x\} }^2} + 3(\sin 2\pi x)} \right)\,dx} $ where $\{ x \}$ denotes the fractional part function.
$ABCD$ is a rhombus. Its diagonals $AC$ and $BD$ intersect at the point $M$ and satisfy $BD = 2AC$. If the points $D$ and $M$ represents the complex numbers $1 + i$ and $2 - i$ respectively, then $A$ represents the complex number
Let the coefficients of the middle terms in the expansion of $\left(\frac{1}{\sqrt{6}}+\beta x\right)^{4},(1-3 \beta x)^{2}$ and $\left(1-\frac{\beta}{2} x\right)^{6}, \beta>0$, respectively form the first three terms of an $A.P.$ If $d$ is the common difference of this $A.P.$, then $50-\frac{2 d}{\beta^{2}}$ is equal to.
The locus of the centre of the circle $\frac{1}{2} (x^2 + y^2) + x \cos \theta + y \sin \theta -4 = 0$ is :-
If ${x^2} + ax + 10 = 0$ and ${x^2} + bx - 10 = 0$ have a common root, then ${a^2} - {b^2}$ is equal to
An experiment has $10$ equally likely outcomes. Let $\mathrm{A}$ and $\mathrm{B}$ be two non-empty events of the experiment. If $\mathrm{A}$ consists of $4$ outcomes, the number of outcomes that $B$ must have so that $A$ and $B$ are independent, is
The functioin $f\left( x \right) = \frac{x}{2} + \frac{2}{x}$ has a local minimum at  $X=$ ........