Answer:
It's 80 cm I believe
Step-by-step explanation:
Take your figure and divide it into different shapes, 2 triangles, one trapezoid. 5 x 4 = 20 for your triangles, and because you have 2, it's 20 x 2 which gives you 40, and then your trapezoid, 4 x 10 = 40 + 40 = 80
