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Tetrahedrons and quadrilaterals.
yes
Tetrahedrons are triangular based pyramids that have 4 faces, 6 edges and 4 vertices which were built by the ancient Egyptians.
Tetrahedrons are 4-sided solids. A regular tetrahedron is the equilateral pyramid, having one pyramid as the base and three others the sides.
tetrahedrons
polymorphs
good question
tetra means four.
Two regular tetrahedrons connected face to face make a "regular triangular dipyramid." That is one of the 92 "Johnson solids." Those are the convex polyhedrons whose faces are regular polygons but do not belong to either of the two sets of highly symmetric polyhedrons (the Platonic and the Archimedean) or to the perhaps less interesting two infinite families of prisms and antiprisms. If the two tetrahedrons overlap, both centers at the same place but with the tetrahedrons facing in opposite directions, it makes a "stellated octahedron."
Silicate minerals.
More like two tetrahedrons stuck together.
pyramids are important to math and connect to math in many ways:1. they are made of huge blocks, which are rectangular prisms, which is math2. they are tetrahedrons, which is also math3. and if you wanted to go FURTHER, theres base and length and hight and width, all that stuff, which is math!