2. 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°). Equilateral triangle Right triangles

3. 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 There are quite a few members of the quadrilateral family.

4. 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. Rectangle

5. 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

6. 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

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

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

9. 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 A=π r * r ( r = Radius )

10. Horizontal (straight) Vertical (straight) Oblique Ellipse (and circle) Curve

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