Answer: 120 cm².
Step-by-step explanation:
1. To solve this problem you must apply the formula for calculate the area of a triangle, which is:
[tex]A=\frac{b*h}{2}[/tex]
Where b is the base and h is the height of the triangle.
2. Then, when you substitute the values given in the problem you obtain:
[tex]A=\frac{(4cm)(5cm)}{2}=10cm^{2}[/tex]
3. You know that the shape is made of 12 right triangle of equal size, therefore, multiply the area obtained by 12.
4. Then the area of the shape is:
[tex]A_s=12(10cm^{2})=120cm^{2}[/tex]
