1.

The length of a diagional of a square is 6 cm find the length of the side correct to millimetre​

Answer»

Answer:

42.5 mm

Step-by-step explanation:

Let we have a square ABCD.

now AC²=AB²+BC²(by PYTHAGORAS theorem)

6²=x²+x² (sides are equal in square say x)

36=2x²

x²=36/2

x²=18

x=+ √18 cm

x= 4.25 (length can't be NEGATIVE)

x= 4.25×10=42.5mm

Ans. = 42.5 mm


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