Objective

By the end of this lesson, you will be able to identify and classify different types of angles and polygons.

Materials and Prep

• Pencil
• Blank paper

No prior knowledge or preparation is required for this lesson.

Activities

1. Draw an angle:

   • Start by drawing a straight line on your paper.
   • Choose a point on the line and mark it as the vertex of the angle.
   • Draw two rays starting from the vertex and extending outwards to form the sides of the angle.

2. Classify angles:

   • Measure the angles you drew using a protractor or estimation.
   • Identify and label each angle as acute, right, obtuse, or straight.

3. Explore polygons:

   • Draw different closed figures using straight lines.
   • Count the number of sides and vertices of each figure.
   • Classify the shapes as triangles, quadrilaterals, pentagons, hexagons, etc.

Seventh Grade Talking Points

• "Angles are formed by two rays with a common endpoint called the vertex."
• "An acute angle measures less than 90 degrees."
• "A right angle measures exactly 90 degrees."
• "An obtuse angle measures more than 90 degrees but less than 180 degrees."
• "A straight angle measures exactly 180 degrees."
• "Polygons are closed figures made up of straight line segments."
• "A triangle is a polygon with three sides and three vertices."
• "A quadrilateral is a polygon with four sides and four vertices."
• "A pentagon is a polygon with five sides and five vertices."
• "A hexagon is a polygon with six sides and six vertices."