Write the equation of the circle with diameter DE.
D(18,16)
E(-6,-2)
answer:______________________________
STEP 1:
Determine the midpoint using the midpoint formula, and points D(18, 16) and E(- 6, - 2). The coordinates of the
midpoint are also the coordinates of the center of the circle (h, k).
STEP 2:
Determine the radius by substituting one of the two points (D or E), as well as the coordinates of the center of the
circle (h, k) into the circle formula: .
STEP 3:
Substitute the coordinates of the center of the circle (h, k) and the radius, squared (), into the circle formula:
to determine the equation of the circle.
Then do a check!!
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