Unit 8, Lesson 1
Las áreas de los cuadrados
Grado 8
1.1
Warm-up
Dos regiones
¿Cuál región sombreada es más grande? Explica tu razonamiento.
Two quadrilaterals, labeled “A” and “B,” on square grids. Both quadrilaterals are not aligned to the horizontal or vertical gridlines. Quadrilateral “A” is on a grid that has 2 rows of 4 squares. The quadrilateral is drawn starting at the left most vertex. The second vertex is 2 squares to the right and 1 square up from the first vertex. The third vertex is 2 squares to the right and 1 square down from the second vertex. The fourth vertex is 2 squares to the left and 1 square down from the third vertex. The first vertex is 2 squares to the left and 1 square up from the fourth vertex. Quadrilateral “B” is on a grid that has 3 rows of 3 squares. The quadrilateral is drawn starting at the left most vertex. The second vertex is 1 square to the right and 2 squares up from the first vertex. The third vertex is 2 squares to the right and 1 square down from the second vertex. The fourth vertex is 1 square to the left and 2 squares down from the third vertex. The first vertex is 2 squares to the left and 1 square up from the fourth vertex.
1.3
Activity
Descompongamos para encontrar el área
Encuentra el área de cada cuadrado sombreado (en unidades cuadradas).
Student Lesson Summary
El área de un cuadrado con longitud de lado de 12 unidades es
A veces queremos encontrar el área de un cuadrado, pero no sabemos su longitud de lado. Por ejemplo, ¿cómo podemos encontrar el área del cuadrado
Una forma es encerrarlo en un cuadrado cuyas longitudes de lado conozcamos.
El cuadrado exterior
None