40
NO. 20 x 2 = 40; 20 x 20 = 400
No.
No.
There are no rational factors.
Yes, it's 400.
625 25 x 25 = 625
√125X² = 125X
100cm squared = 0.01 metres squared
a2/2
twenty three has no square root but it will be in between 4 squared and 5 squared but more towards the 5. also there is + and - square roots such as the two square roots of 9 are +3 and -3. - times - = + and + times + = +.
6.4516 cm squared
4 m squared 1cm sqaured is equal to 0.0001m squared
10,000