Question

the diagonal of a square is 12 centimetre long find its area and length of one side​

Answer 1

• Let side of square = a cm

• diagonal = 12cm
• by phythagoras theorem, (a^2+a^2)=12^2
• 2a^2=144
• a^2=72

area of square=a^2=72^2

a^2 =72 =