A parallelogram and a decagon have the same area.
The area of the parallelogram is 1/2(5x+20).
The area of the decagon is 5(x+1).
What is the area of the decagon?
What is the area of the decagon?
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1
Answer:
15
Step-by-step explanation:
area of paralelleogram: 1/2(5x+20)=2.5x+10
area of decagon: 5(x+1)=5x+5
according to the question,
area of paralelleogram=area of decagon
- 2.5x+10=5x+5
- 10-5=5x-2.5x
- 5=2.5x
- 5/2.5=x
- x=2
area of decagon: 5x+5=5(2)+5=10+5=15
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