Given: a, b are rt 's ac = bd prove: mc = md which of the following statements is the reason for line 2 in the proof? right angles are equal. vertical angles are equal. definition of bisects.

The answer is Vertical angles are equal.

Vertical angles are equal

Step-by-step explanation:

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The number of times that 0 to 9 can be arranged if each digit is used once is c. 10!

There are 10 numbers in the range of 0 - 9 which means that after the first number is selected to be arranged, there will be 9 numbers left to be arranged and then 8 and so on till all numbers are ordered.

The number of ways these numbers can be arranged is therefore:

= 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1

This is the same as 10!.

In conclusion, the numbers can be arranged in 10! ways.

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