
PERSAMAAN LINGKARAN BAGIAN 1
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•
Mathematics
•
2nd Grade
•
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Tya Wahyu Tya Wahyu
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9 Slides • 4 Questions
1
Persamaan Lingkaran
Some text here about the topic of discussion
2
Multiple Choice
Manakah yang termasuk gambar lingkaran?
3
Pengertian
Lingkaran adalah tempat kedudukan titik-titik yang berjarak sama terhadap sebuah titik tertentu.
Sebuah titik tertentu tersebut disebut pusat lingkaran
Jarak yang sama itu dinamakan jari-jari lingkaran (radius)
Some text here about the topic of discussion
4
r²=x²+y² atau
x²+y²=r²
persamaan lingkaran
Persamaan Lingkaran yang berpusat di O(0,0)
5
Contoh
Tentukan persamaan lingkaran yang berpusat di O(0,0) dan melalui titik (-3,4).
Jawab:
x²+y²=r²
(-3)²+4²=r²
9+16=r²
25=r²
jadi, persamaan lingkarannya adalah: x²+y²=25
Some text here about the topic of discussion
6
Multiple Choice
Persamaan lingkaran dengan pusat O(0,0) dan melalui titik (1,-2) adalah ....
x2+y2=5
x2+y2=5
x2−y2=5
x2+y2=55
7
r²=(x-a)²+(y-b)²
atau
(x-a)²+(y-b)²=r²
Persamaan Lingkaran
Persamaan Lingkaran yang berpusat di P(a,b) dan berjari-jari r
8
Contoh
Tentukan persamaan lingkaran yang berpusat di P(2,-3) dan berjari-jari 4.
Jawab:
(x-a)²+(y-b)²=r²
(x-2)²+(y-(-3))²=4²
(x-2)²+(y+3)²=16
jadi persamaan lingkaran tersebut adalah (x-2)²+(y+3)²=16
Subject | Subject
Some text here about the topic of discussion
9
Multiple Choice
Persamaan lingkaran yang berpusat di titik (3,-4) dan berjari-jari 3 adalah ....
(x+3)2+(y+4)2=3
(x+3)2+(y−4)2=3
(x−3)2+(y+4)2=9
(x+3)2+(y+4)2=9
10
Bentuk Umum Persamaan Lingkaran
Subject | Subject
Some text here about the topic of discussion
11
Contoh
Subject | Subject
Some text here about the topic of discussion
12
Jadi, jari-jari lingkaran tersebut adalah 5
13
Multiple Choice
titik pusat dan jari-jari lingkaran x2+y2−4x−2y−15=0 adalah ....
(2,−1) dan 5
(2,1)dan 25
(−2,1) dan 25
(−2,−1) dan 25
Persamaan Lingkaran
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