Review the concept of area and its importance in mathematics, presenting examples of practical applications.
Introduce the concepts of polygon and circle and explain their relationship with area.
Review the formulas for calculating the area of triangles and quadrilaterals: square, rectangle, rhombus, and trapezium.
Review the formula for calculating the area of the circle and its elements, such as the radius, diameter, and chords.
Solve on the blackboard examples of problems involving the calculation of the area of these polygons and circles.
For application, hand out exercises for practice. Include exercises of different difficulty levels. It is important that the difficulty increases gradually.
If there is availability to use computers or projectors, the teacher can build the polygons in geometry programs and, after students calculate, verify the results with the help of the computer with the students.
It is important for the teacher to walk around the room during the process, assessing the students' skills and difficulties, offering support and answering questions.
For exercise bench:
Plane Figures Area: Solved and Commented Exercises
ASTH, Rafael. Mathematics Lesson Plan: Area of Polygons and Circles (8th grade).All Matter, [n.d.]. Available in: https://www.todamateria.com.br/plano-de-aula-de-matematica-area-de-poligonos-e-circulos-8-ano/. Access at: