The best way to draw a tiger is by visually breaking it into parts consisting of basic shapes like circles, triangles, squares and rectangles. To draw a tiger, begin by sketching the overall shape of the tiger, such as an oval for the body or circle for the face, and then add details to it such as ears and a tail by sketching their basic shapes.
Drawing complex items is simplified by using basic shapes. Quickly sketching an oval to represent the general shape of a tiger's body, and adding to it the circles, rectangles and triangles that represent connected body parts, gives the artist an idea of how much space on the paper the tiger drawing will use as well as a starting point for adding detail. Knowing and defining the size of the drawing at the beginning allows artists to avoid running out of room before the drawing is finished.
Quickly sketching the basic shapes of different parts of a drawing allows the artist to avoid second guessing and striving for perfection. This allows the brain to instinctively pick out "the important lines" of the image. Erasing misplaced lines, incorporating shading and adding and removing curves or angles are ways to modify mistakes and add more dimension and realistic detail to the drawing after completing the sketch using only basic shapes.