1. Area of triangles

2. What’s the area of this rectangle?
10 cm
6 cm
60 cm2

3. What’s the area of the red triangle?
10 cm
6 cm
30 cm2

4. Area of a triangle
height
length
Area = ½ length x height

5. What’s the area?
4 cm
8 cm
16 cm2
½ of 8 x 4 =

6. What’s the area?
8 cm
32 cm2
8 cm

7. What’s the area?
8 cm
12 cm2
3 cm

8. What’s the area?
2 cm
14 cm
14 cm2

9. What’s the area?
15cm
20cm
150 cm2

10. What’s the area?
20 cm
8 cm
80 cm2

11. What if the triangle doesn’t have a right angle?

12. Split it up!
4 cm
20 cm

13. Split it up! 20 cm (½ of 10 x 4) + ( ½ of 10 x 4) = 20 + 20 = 40

14. What’s the area?
10 cm
40 cm2
8 cm