Grade 3 Geometry worksheet for calculating the area of rectangles using a grid.

To find the area of each rectangle, we count how many small blue squares are inside it. Since each square equals 1 square unit, the total number of squares is the area.

Let’s go row by row, left to right:

Row 1:
- Left rectangle: 2 squares wide × 1 square tall = 2 squares → Area = 2
- Right rectangle: 3 squares wide × 1 square tall = 3 squares → Area = 3

Row 2:
- Left rectangle: 1 square wide × 2 squares tall = 2 squares → Area = 2
- Right rectangle: 2 squares wide × 2 squares tall = 4 squares → Area = 4

Row 3:
- Left rectangle: 3 squares wide × 2 squares tall = 6 squares → Area = 6
- Right rectangle: 4 squares wide × 2 squares tall = 8 squares → Area = 8

Row 4:
- Left rectangle: 5 squares wide × 2 squares tall = 10 squares → Area = 10
- Right rectangle: 6 squares wide × 2 squares tall = 12 squares → Area = 12

All calculations checked — multiplying width by height gives the correct number of squares.

Final Answer:
2, 3, 2, 4, 6, 8, 10, 12