Question

If A= -11/7 B= 4/9 C= -5/18
Verify A+(B+C) = (A+B)+C
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Answer 1

Answer:

Both sides are equal

Step-by-step explanation:

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Answer 2

Answer:

Let point(0,7,−10),(1,6,−6) and (4,9,−6) be denoted by A,B and C respectively

AB=

(1−0)

2

+(6−7)

2

+(−6+10)

2

=

(1)

2

+(−1)

2

+(4)

2

=

1+1+16

=

18

⇒AB=3

2

BC=

(4−1)

2

+(9−6)

2

+(−6+6)

2

=

(3)

2

+(3)

2

=

9+9

=

18

⇒BC=3

2

CA=

(0−4)

2

+(7−9)

2

+(−10+6)

2

=

(−4)

2

+(−2)

2

+(−4)

2

=

16+4+16

=

36

=6

Here AB=BC



= CA

Thus the given points are the vertices of an isosceles triangle

Step-by-step explanation:

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