Area of triangles

1
Area of triangles
2
Whats the area of this rectangle?
10 cm
6 cm
60 cm2
3
Whats 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
Whats the area?
4 cm
8 cm
16 cm2
½ of 8 x 4
6
Whats the area?
8 cm
32 cm2
8 cm
7
Whats the area?
8 cm
12 cm2
3 cm
8
Whats the area?
2 cm
14 cm
14 cm2
9
Whats the area?
15cm
20cm
150 cm2
10
Whats the area?
20 cm
8 cm
80 cm2
11
What if the triangle doesnt have a right angle?
12
Split it up!
4 cm
20 cm
13
Split it up!
4 cm
10 cm
10 cm
20 cm
(½ of 10 x 4) ( ½ of 10 x 4) 20 20
40
½ of 20 x 4
40
14
Whats the area?
10 cm
40 cm2
8 cm