The instructor reviews the following terms with children and points out each example in the top image:

• Altitude: The height of a triangle from its base to its apex.
• Apex: The topmost vertex of a triangle.
• Side: A line connecting the vertexes of a triangle.
• Base: The lowest side of a in a triangle or other polygon.
• Hypotenuse: The side of a right triangle opposite the right angle.

Children complete the following drill work:

1. Draw an acute triangle and label its base, apex, and sides.
2. Draw an obtuse triangle and add a dotted line to represent its altitude.
3. Draw a right triangle and label its hypotenuse.
4. Draw an equilateral triangle and label its base and sides.
5. Draw a rectangle and mark and label the diagonals.
6. Draw a square and mark and label the diagonals.
7. Draw an equilateral triangle with the apex pointing upward.
8. Draw an equilateral triangle with the apex pointing downward.