Is 45 a prime or composite number

45 is a composite number because, it can be multiplied by 1,5,9,15 and 45.

Step-by-step explanation:

HOW TO SEE IF A NUMBER IS COMPOSITE

Look at its last digit. If it is 2,4,6,8,0 - it is 100% composite (only the digit 2 is prime)

2 is the only EVEN PRIME number.

Now, also 5.

If a number's last digit is 5, it's 100% composite.

I think that with other digits, it's 50%.

Therefore, we conclude that 45 is composite.

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.

my answer got deleted but it's a

step-by-step explanation: