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Finger [1]
3 years ago
9

Identify the center and radius of each circle.

Mathematics
1 answer:
Gemiola [76]3 years ago
3 0

Answer:

1. Centre = (1,-3); r = 2;  

2. Centre = (2,-1); r = 4  

Step-by-step explanation:

1. (x - 1)² + (y + 3)² = 4

The centre-radius equation for a circle is

(x - h)² + (y - k)² = r²

The centre of the circle is at (h, k) and the radius is r.

By comparing terms in the two equations we see that

h = 1, k = -3, r = 2

Centre = (1,-3); r = 2

2. (x - 2)² + (y + 1)² = 16

Here,

h = 2, k = -1, r = 4

Centre = (2,-1); r = 4

The figure below shows the first circle in red and the second in green.

 

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The distance from the top of the cone to the edge is 15 feet. The height of the cone is 6 feet. What is the radius of the cone?
soldi70 [24.7K]

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