Question

each diagonal of a square is 20 CM then its area is​

Answer 1

Answer:

area of square = side × side / 2

= 20 cm × 20cm/2

= 400cm²/2

= 200cm² is area of square.

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Answer 2

Step-by-step explanation:

diagonal makes square into two halves

so area of square=s^/2

√2s=20

s=200

area=200×200/2

=20000cm^