Drawing Basic Shapes

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Drawing Basic Shapes
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Triangles
Equilateral triangle

• Equilateral triangles have all angles equal to
  60
• All sides equal length.
• All equilateral triangles have 3 lines of
  symmetry.

Right triangles (or right angled triangles) have
one right angle (equal to 90).
Right triangles
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Quadrilaterals
There are quite a few members of the
quadrilateral family.

• Squares have 4 equal sides and 4 right angles.
• They have 4 lines of symmetry.
• All squares belong to the rectangle family.
• All squares belong to the rhombus family.
• All squares are also parallelograms.

Square
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Quadrilaterals
Rectangle

• Rectangles have 4 sides and 4 right angles.
• They all have 2 lines of symmetry (4 lines if
  they are also a square!)
• All rectangles belong to the parallelogram
  family.

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Quadrilaterals

• Parallelograms have 2 pairs of parallel sides.
• Some parallelograms have lines of symmetry
  (depending on whether they are also squares,
  rectangles or rhombuses), but most do not.

Parallelogram
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List of Geometrics Shapes - 3D Shapes

• Cubes have 6 faces, 12 edges and 8 vertices.
• All sides on a cube are equal length.
• All faces are square in shape.
• A cube is a type of cuboid.

Cube
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Cylinders

• Closed Cylinders have 3 faces, 2 edges and 0
  vertices.
• Closed cylinders have 2 circular or elliptical
  faces and one curved rectangular face.

Cylinder
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Cones

• Cones have 2 faces, 1 edge and 1 apex (which is
  described by some mathematicians as a vertex).

Cones
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Area of geometric shapes

• Area of regular shape is calculated using
  standard mathematical formula.
• a) Triangle
• Use following formula to calculate area of
  triangle.
• Area ½ base height
• b) Quadrilateral
• Area of quadrilateral Length breadth
• c) Circle
• Area of circle Ap r r ( r Radius )

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Geometric Lines to know

• Horizontal (straight)
• Vertical (straight)
• Oblique
• Ellipse (and circle)
• Curve

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Methods of Drawing

• Sketching
• Drafting
• Computer Assisted Design (C.A.D.)