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Nelly6978
14.01.2020 •
Mathematics
Pls
a circle is centered at point (-7,-1) and passes through the point (8,7).
the radius of the circle is units. the point (- lies on this circle.
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Ответ:
Part 1) The radius of the circle is![17\ units](/tpl/images/0453/5567/33fe9.png)
Part 2) The points (15,14) and (-15,-16) lies on this circle
Step-by-step explanation:
Part 1
we know that
The distance between the center of the circle at point (-7,-1) and the point (8,7) is equal to the radius of the circle
so
the formula to calculate the distance between two points is equal to
substitute the values
Part 2
we know that
If the point (-15,y) lies on the circle, then the ordered pair must be satisfy the equation of the circle
The equation of the circle is equal to
substitute the value of x=-15 in the equation and solve for y
so
therefore
The points (15,14) and (-15,-16) lies on this circle
see the attached figure to better understand the problem
Ответ:
7
Step-by-step explanation: