GEOMETRICAL SHAPES
Exercise 1
Watch the video about geometrical shapes in English
Exercise 2
Learn the names of geometrical shapes
Triangle
A three-sided polygon. The sum of the angles of a triangle is 180 degrees.
Examples
Rectangle
A four-sided polygon having all right angles. The sum of the angles of a rectangle is 360 degrees.
Examples:
Square
A four-sided polygon having equal-length sides meeting at right angles. The sum of the angles of a square is 360 degrees.
Rhombus
A four-sided polygon having all four sides of equal length. The sum of the angles of a rhombus is 360 degrees.
Examples: 
Trapezoid
A four-sided polygon having exactly one pair of parallel sides. The two sides that are parallel are called the bases of the trapezoid. The sum of the angles of a trapezoid is 360 degrees.
Examples: 
Pentagon
A five-sided polygon. The sum of the angles of a pentagon is 540 degrees.
Examples:
Hexagon
A six-sided polygon. The sum of the angles of a hexagon is 720 degrees.
Examples:
Heptagon
A seven-sided polygon. The sum of the angles of a heptagon is 900 degrees.
Examples: 
Octagon
An eight-sided polygon. The sum of the angles of an octagon is 1080 degrees.
Examples:
Nonagon
A nine-sided polygon. The sum of the angles of a nonagon is 1260 degrees.
Examples:
Decagon
A ten-sided polygon. The sum of the angles of a decagon is 1440 degrees.
Examples
Circle
A circle is the collection of points in a plane that are all the same distance from a fixed point. The fixed point is called the center. A line segment joining the center to any point on the circle is called a radius.
Example:
A semi-circle
A semicircle is a two-dimensional geometric shape that forms half of a circle. Being half of a circle's 360°, the arc of a semicircle always measures 180° or a half turn. A triangle inscribed in a semicircle is always a right triangle.
