Which quadrilateral has two pairs of different but equal adjacent sides?
2 answers:
A kite has two pairs of congruent adjacent sides. More specifically, if we have a four sided figure with sides p, q, r, s (as shown in the diagram), then
p = q
r = s
Furthermore, p is not equal to r or s. Similarly, q is not equal to r or s. All of these facts are visually shown by the tick-marks. Segments with a single tick-mark indicate they are same length. Segments with a double tick-mark are the same length.
p = q
r = s
Furthermore, p is not equal to r or s. Similarly, q is not equal to r or s. All of these facts are visually shown by the tick-marks. Segments with a single tick-mark indicate they are same length. Segments with a double tick-mark are the same length.
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Answer:
5040,56
Step-by-step explanation:
We have to construct pass words of 4 digits
a) None of the digits can be repeated
We have total digits as 0 to 9.
4 digits can be selected form these 10 in 10P4 ways (since order matters in numbers)
No of passwords = 10P4
=
b) start with 5 and end in even digit
Here we restrain the choices by putting conditions
I digit is compulsorily 5 and hence only one way
Last digit can be any one of 0,2,4,6,8 hence 5 ways
Once first and last selected remaining 2 digits can be selected from remaining 8 digits in 8P2 ways (order counts here)
=56