2. Evaluate the the following:
@ (-1) (-2) × (-3) + (-4) x (-5).
(b) (-1) × (-5) × (-4) × (-6).
(c) -245 + 90 + (-140).
(d) (-9) × 5 × (-1) × 1.
PLEASE ANSWER ME IT IS IMPORTANT
Answers
Step-by-step explanation:
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Answer:
For a rectangle, the opposite sides need to be equal and diagonals also have to be equal.
Now by using
Distance Formula =
(x
2
−x
1
)
2
+(y
2
−y
1
)
2
Here coordinates of A are x
1
and y
1
and coordinates of B are x
2
and y
2
Similarly for other coordinates also.
Length AB=
(−2+4)
2
+(−4+1)
2
=
13
Length BC=
(4+2)
2
+(0+4)
2
=
52
Length CD=
(2−4)
2
+(3−0)
2
=
13
Length DA=
(−4−2)
2
+(−1+3)
2
=
52
Diagonal AC=
(4+4)
2
+(0+1)
2
=
65
Diagonal BD=
(2+2)
2
+(3+4)
2
=
65
ABCD are the vertices of a rectangle since AB=DC and AD=BC, also diagonal AC=BD.
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