10
| 8 Diagram 3 shows the arrangement of eight chairs in a room.
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(a) Ali, Othman and Ridzuan came into the room and each occupied a chair, find the number
of ways they can be seated.
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(b) If Abu and his wife also came into the room and they prefer to sit side by side, find the
number of ways the five of them can be seated.

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source:

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step-by-step explanation:

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step-by-step explanation:

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