Drawing and identifying a polygon in the coordinate plane – In this lesson we are given the coordinates of points in a coordinate plane.…Read More

Naming polygons – Polygons are 2-dimensional closed shapes made of straight lines.…Read More

Acute, obtuse, and right triangles – Let us consider the acute, the right and the obtuse angles as follows. If we close the third sides of these angles, acute, right and the obtuse triangles are fo…Read More

Classifying scalene, isosceles, and equilateral triangles by side leng – Triangles can be classified according to their sides or according to their angles. All of each side or angle may be of different or the same sizes; any two side…Read More

Finding an angle measure of a triangle given two angles – The sum of angles of a triangle is 180°.…Read More

Naming segments, rays, and lines – Point − A basic geometric entity. It that has no length, width or height. It is described only by its position.…Read More

Identifying parallel and perpendicular lines – Parallel lines − If two lines are equidistant from each other extending indefinitely in both directions, then they are said to be parallel to each other. Para…Read More

Angles, Lines, and Polygons – This tutorial provides comprehensive coverage of Angles, Lines, and Polygons based on Common Core (CCSS) and State Standards and its prerequisites. Students can…Read More

Measuring an angle with the protractor – An angle is formed when two lines intersect in a point. The rays emerging from the common point called vertex are the arms of the angle.…Read More

Acute, obtuse, and right angles – We measure angles in degrees. Angles can also be measured in other units like radians. One complete rotation around a point is 360 degrees or 2 pi radians. We u…Read More