Answer:
The area if the shape is 10 cm².
Step-by-step explanation:
First, you have to find the area of each triangle :
[tex]area = \frac{1}{2} \times base \times height[/tex]
[tex]let \: base = 5,height = 4[/tex]
[tex]area = \frac{1}{2} \times 5 \times 4[/tex]
[tex]area = \frac{1}{2} \times 20[/tex]
[tex]area = 10 {cm}^{2} [/tex]
This shape contain 10 similar triangles so you have to multiply by 10 :
[tex]area = 10 \times 10[/tex]
[tex]area = 100 {cm}^{2} [/tex]
