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What is a 3D shape using a pentagon called?
Dodecahedron. The 5 "Platonic Solids" are: Cube/ 6 square sides Tetrahedron/ 4 triangles Rhomboid/ 8 triangles Dodecahedron/ 12 pentagons Icosahedron/ 20 triangles
How can quadrilaterals be formed by using 4 isosceles triangles?
The diagonals of a square for example divides it into 4 isosceles triangles
How do you figure out square footage?
The answer depends on how simple of complicated the shape is. For a reasonably simple shape, break it don into shapes such as triangles, parallelograms and trapezia, and circles or ellipses. Measure the dimensions of these shapes in feet and then, using standard formulae, calculate their areas - which will be in square feet. Add the results together to get the area of the shape.For more complicated shapes you may need to approximate the area using the above shapes to approximately match the shape.
Can you make a square without using any triangles from a tangram?
no because it has to be all equal and right angles
Is a square 3d shape?
No, a square is a 2d shape, although a 3d shape can be made using multiple squares at different angles than 180 or 0 to each other.
