Question Video: Calculating the Area of a Shape by Counting the Unit Squares Mathematics • 3rd Grade

Estimate the area of the figure.


Video Transcript

Estimate the area of the figure.

Area is always given in square units. To find the area of this figure, we’ll count the number of squares that it takes up. First, we’ll count the whole squares and then the half squares and then we’ll add those two together. Starting at the top, one square, two, three, four, five, six, seven, eight, nine, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, and 23. Inside this figure, there’re 23 whole squares.

Now, we need to count the half squares: one, two, three, four, five, five half squares, 23 whole squares. Now, we want to ask the question, how many wholes do these five halves make? Two halves make another whole. These four halves would give us two more whole squares. That makes the 24th and the 25th square unit. And then, there is one remaining half. We have 25 square units and one-half of a square.

And so we will call the area 25 and one-half square units, 25 and five-tenths.

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