Angles: 6th grade math lessons for download PDF.

A sixth grade math lesson on angles to develop students’ knowledge and skills in geometry. An angle is a measure of the opening between two straight lines that meet at a common point called the vertex of the angle. It is usually expressed in degrees or radians.
In this chapter, we will study the definition and vocabulary as well as the different types of angles (acute, obtuse, complementary, supplementary, right null, flat, reentrant and salient. Later, we will review the use of the protractor and the bisector of an angle.

A protractor is a tool used to measure angles. It is composed of a flat base or a graduated plate on which is fixed a pivoting rod called mobile arm. It is used by positioning the base on the vertex of the angle to be measured and rotating the movable arm until it is aligned with the two lines forming the angle. The reading of the angle is then done on the scale of the plate. It is used in the fields of geometry, construction, mechanics, topography, etc.
Students will be expected to construct and trace angles and measure with a protractor. The mastery of the different angles and definitions of the course must be mastered since these notions will be recurrent in the sixth grade and throughout your schooling.

Skills to assimilate on the angles:

• Know the definition of an acute, obtuse, right and flat angle;
• Know how to draw an angle using a protractor;
• To know how to measure with a protractor and to calculate, also, its measure on a geometrical figure;
• Complementary and supplementary angles;

This course is in accordance with the official programs of thenational education.

In addition, you can continue with the exercises on the bisector of an angle in the sixth grade.