HOW TO CALCULATE THE AREA OF TRIANGLES

BIEL M., ALBERT L., LUCA Y., IKER M.

WORKSHEET 19EXERCISE 7

INDEX

➤ MEASURES

➤ STEPS

➤ SOLUTION

MEASURESTOTAL SQUARE'S AREA = 25 cm2

2,5

12,510

STEPS

1. Measure the total area (25cm2)

2. Measure the area of the bigger space of the white squares (12,5 cm2).

3. Measure the area of the other space of the white squares (2,5 cm2).

4. Add the areas of the white space (15 cm2).

5. Measure area of the red triangle, subtracting the total area minus the area of the white space (10 cm2).

Step 1 = 25 cm2

Step 2 = 12,5 cm2

Step 3 = 2,5 cm2Step

4

=

10 cm2

Step 5 = 10 cm2

R: THE AREA OF THIS TRIANGLE IS 10 CM2.