Question

If the perimeter of a square is 40 cm , find (a) the length of a diagonal , and (b) its area.


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Answer 1

Perimeter of a square =40cm

4*side=40

Side= 40/4

Side= 10

. '. Diagonal of a square= √2*side

=√2*10

=10√2cm

=10*1.4142=14.1cm

Area of a square = (side) ²

=(10) ²

=100cm²

Hope it helps u

Answer 2

Answer:

In increasing order of hydrogen ion concentration:

pH 11(C) < pH 9(E) < pH 7(A) < pH 4(D) < pH 1 (B)

PH11 – Strongly alkaline

pH9 – weakly alkaline