Matemáticas 3 Grado

1. third grade
Math

2. 1 2 3 4
8
7
6
5
9 10

3. The perimeter of a shape is the total of lengtharound theshape. In a triangle,the
perimeter is the sumof thelengthof its threesides.
1. Whatis a perimeter?

4. 2. In this equilateral triangle, the perimeter is:
7 cm
7cm + 7cm + 7cm = 21 cm

5. 3. In this scalene triangle, the perimeter is:
30 cm
15cm + 17cm + 30cm = 62 cm

6. 4. In this Isosceles triangle, the perimeter is:
18 cm
10cm + 10cm + 18cm = 48 cm

7. 5. Find the perimeter of these triangles:
8m + 8m + 8m = 24m 4
m 4m + 10m + 10m = 14m

8. 6. Find triangles with the same perimeter:
1
1 m

9. H T 0
9 6 6
4 4
8 2 2
-
7. Solve the exercise
1

10. H T 0
9 2 5
0 0
4 2 5
-
8. Solve the exercise
5
H T 0
5 9 8
6 0
3 3 8
- 2

11. H T 0
6 8 5
4 8
4 3 7
-
9. Solve the exercise
2

12. 10. Complete the additions and multiplications.
12 + 12 + 12 + 12 + 12 = 60
12 times 5 = 60