2018 Java Chapter 4 (Week 04)
From: 2018-09-01 00:00:00
To: 2018-10-30 00:00:00
Now: 2024-11-21 21:30:03
Status: Public
A - 기하: 5각형의 넓이
Time Limit: 1s
Memory Limit: 128MB
Submissions: 838 Solved: 554
- Description
오각형의 중심으로부터 정점까지의 거리 r을 입력받아 오각형의 넓이를 계산하는 프로그램을 작성하세요.
Write a program that prompts the user to enter the length from the center of a pentagon to a vertex and computes the area of the pentagon, as shown in the following figure.
where r is the length from the center of a pentagon to a vertex. Round up two digits after the decimal point.
- Input
* Line 1 : 실수 r (0~100)
- Output
* Line 1 : pentagon의 넓이 (소수점 둘째 자리로 반올림)
- Sample Input
-
5.5
- Sample Output
-
71.92
- Source
JAVA2015 PE4.1