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A rectangle is 80 cm long and 20 cm wide. Find, to the nearest degree, the acute angle formed at the intersection of the diagonals.

  • geometry -

    take one of the right-angled triangles, call the base angle Ø
    tanØ = 20/80 = 1/4
    Ø = appr. 14.04°

    can you take it from there?
    I see pairs of isosceles triangles !

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