Question

(1) Write the co-ordinates of the point of intersection of graphs of
equations x = 2 and y = -3.
(2) Diagonal of a square is 20 cm. Find the length and perimeter of
the square.

Answer 1

side of square=diagonal/√2

=20/√2

$20 \div \sqrt{2 \times \sqrt{2 \div \sqrt{2 } } } \\ = 20 \sqrt{2} \div 2 \\ 10 \sqrt{2}$

perimeter of square=

$4 \times 10 \sqrt{2} \\ 40 \sqrt{2}$

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