Plane Figures and Their Properties

This lesson covers the identification and properties of various plane figures such as squares, rectangles, triangles, and circles. It explains how to calculate the area and perimeter of these shapes. The lesson also includes the classification of triangles their sides.

• 03:48 “All angles are equal. Each angle is 90 degrees, just like in the case of a rectangle. The diagonal lines bisect each other at the right angle, 90 degrees, and it has four lines of symmetry. Triangle classification accord...”
• 04:43 “A socialist triangle is a triangle with two equal sides and equal base angles. Two sides of an isosceles triangle are equal. The third side is not of the same angle or the same length as the remaining two sides. Two side...”
• 02:47 “Identifying plane shapes. Properties of a rectangle. The opposite sides are equal and parallel. It has equal angles. Each angle at 90 degrees. For a rectangle, each angle is at 90 degrees. This is 90 degrees, 90, 90, and...”