What does a semisgraph do?

Which of the following is not a polyhedron? How big is a square tissue box? What is a cubiod? How many carats is 12mm? What are the properties of an isosceles triangle? What is the width height and depth of a 15 TV? What shape has 4 equal sides 2 obtuse angles and 2 acute andgles? How many square feet in a space of 36 x 20? What is the answer for the height which is 12 and length which is 12 of a triangl? How many lines of symmetry does an equilateral have? How many square feet in a 8ft by 8ft? How many interior angles does a heptagon have? Does a solid have infinite length? What is the perimeter of a door? How do convex and concave differ? What does a octagon look like? What is the perimeter of an equilateral triangle that has a side length of 16 cm? How many sq ft in 500 meters radius? What is the square footage of 8 by 14? How many rhombuses and triangles make a trapezoid?