Lines, Angles and Figures

Overview

Your student will be learning:

to identify points, lines, line segments, rays, angles, and perpendicular and parallel lines.
define and illustrate lines of symmetry.
to identify acute, right and obtuse angles.
to measure angles in degrees to the nearest whole number using a protractor.
polygons can be described and classified by their sides and angles.
classify two-dimensional figures based on attributes.

Videos
- Angle Measurement & Circle Arcs. This Khan Academy video explains how the measure of an angle is related to a circle.
- Measuring Angles Using a Protractor. Khan Academy explains how to use a protractor to find the measurement of an angle.

Websites
- Measuring Angles. Math Playground gives an opportunity to measure angles with protractor and enter the angle measurement.
- Line Game. In this game your child will identify different points, lines, line segments, rays, perpendicular and parallel lines.
Books
- Shape Up!: Fun with Triangles and Other Polygons by David A. Adler. This is a fun way to explore the concepts of triangles, quadrilaterals, angles, and measuring angles.
- The Greedy Triangle by Marilyn Burns. The author explains and demonstrates many concepts in geometry.