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Sagot :
Answer:
170cm²
Step-by-step explanation:
so the middle rectangle part first
15x10=150
then there's triangles so i'm gonna skip the divided by 2 part.
5x4=20
150+20=170
Solution:
Note that:
- Surface area = 2(Area of triangle) + 3(Area of rectangle)
Finding the area of triangle:
- Area of triangle = 1/2 x 4 x 5
- => Area of triangle = 1/2 x 20
- Area of triangle = 10 cm²
Finding the area of rectangle:
- Area of rectangle = 5 x 10
- => Area of rectangle = 50 cm²
Using the formula of surface area:
- Surface area = 2(Area of triangle) + 3(Area of rectangle)
- => Surface area = 2(10) + 3(50)
- => Surface area = 20 + 150
- => Surface area = 170 cm²
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