A triangle is a 2 dimensional shape whereas a cube is a 3 dimensional shape
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A cylinder is a round object with two flat ends, like a paper towel roll. A sphere is completely round, like a ball.
its the pointy bit
Cube: 6 faces, 12 edges and 8 vertices. Cuboid: 6 faces, 12 edges and 8 vertices. Sphere: 1 Face and no edges or vertices. Cylinder: 3 faces, 2 edges and no vertices. Cone: 2 faces, and 1 edge and vertices. Triangle Pyramid: 4 faces and vertices and 6 edges. Square Pyramid: 5 faces and vertices and 8 edges. Triangle Prism: 5 faces, 9 edges and 6 vertices. Examples, Cube: A box Cuboid: A keyboard Sphere: A ball Cylinder: Can of beans Cone: Ice-cream cone Triangle Pyramid: Bit of a tobarone bar Square Pyramid: Egyptian Pyramid Triangle Prism: Tobarone Bar
Generally the side or facet of a cube is called the faceof that cube, so the answer is yes. The other two terms we apply to the cube are edge and vertex, and with a bit of though, you can easily figure out how they are applied. Of you can use the link below for more information.
A right triangle is easy, simply multiply the two sides and divide by two. A non-right triangle is a bit more of a challenge. You have to make it a right triangle by adding a right triangle to it. Calculate and then subtract the area of what you had to add.