Triangles are used extensively because they are fundamentally rigid, because three line segments can define one and only one triangle.
Compare a trianlge to, say, a square, which could flex at its vertices to form a rhombus. If you take a square, however, and insert one diagonal, you basically have two triangles, which make the square rigid and not prone to collapse.
Arches are also fundamental in architecture because of the way they distribute weight to the pillars that support them. Arches also convert horizontal and lateral forces to vertical ones.
Geometric and angular shapes are general classes of shapes associated with geometry and with geometry/trigonometry respectively. The two terms ("geometric shapes" and "angular shapes") are very general in nature, and it isn't really "doable" to make a list of all the geometric and angular shapes one may encounter.
to make it a decration
A rhombus and a trapezoid do not make a specific shape together. They are two separate geometric shapes with different properties and characteristics.
The geometric solids that appear to make up the Washington monument is Egyptian obelisks.
Make 5 shapes using Tangrams.
Geometric and angular shapes are general classes of shapes associated with geometry and with geometry/trigonometry respectively. The two terms ("geometric shapes" and "angular shapes") are very general in nature, and it isn't really "doable" to make a list of all the geometric and angular shapes one may encounter.
to make it a decration
two half circles
I suppose you could use Popsicle sticks. Glue them together to make a square, rectangle, triangle etc. You can pretty much make any geometric shape that doesn't have curves.
They are. For all the material the use, you could make a really strong triangular pyramid.
A rhombus and a trapezoid do not make a specific shape together. They are two separate geometric shapes with different properties and characteristics.
Covalent bonded molecules adopt geometric shapes due to electron repulsion. Electrons in the outer energy levels of atoms repel each other, causing the atoms to move into positions that minimize this repulsion. This results in specific geometric arrangements that contribute to the stability of the molecule.
Snow is very beautiful at Christmas season. Snow presents wonderful geometric shapes when seen on a microscope.
the simple wood and wire bridges are really strong and easy to make. You should do that
a triangle and a circle :)
Beam Bridges were built to make longer and more durable bridges.
To make a structure strong you must carefully observe the testing of the weight it can hold.