heptagon and an equilateral triangle
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some shapes tile and some don't because if the side angles don't equal a factor of 360 degrees it will not tile and if the side angles do equal a factor a 360 degrees it willtile.
TWO SHAPES THAT ARE THE SAME SIZE AND SAME SHAPE ARE CONGRUENT. THEY CAN BE TURNED OR ROTATED ANY DIRECTION. POLYGONS AND ANY OTHER SHAPES CAN BE CONGRUENT. LOOK AROUND YOU, YOU'LL FIND MANY CONGRUENT FIGURES. PLANE FIGURES HAVE TO BE ON PAPER OR A FLAT AREA LIKE A PICTURE. THEY ARE TWO DIMENSIONAL. :)
A regular octagon will not tessellate but an irregular one can.
(dali mi bannana!) it mean that its a radical of 2 shapes + a triangle divided by guwno
No, two dimensional shapes do not have faces