miércoles, 15 de febrero de 2017

1373. Special quadrilaterals

    A circumscriptible (or tangential) quadrilateral has the following property: its opposite sides add up to the same length (the semiperimeter).
    An inscriptible (or cyclic) quadrilateral has the following property: its opposite angles add up to the same width (a streight angle).
    Nina Guindilla proved both properties...

    Dear Teacher:
a + c = e + f + g + h
b + d = e + f + g + h
2α + 2γ = 360°
α γ = 180°
and as well
 β δ = 180°

No hay comentarios:

Publicar un comentario en la entrada