Activity 4: Is this a circle?
Determine which of the following equations are equations of a circle. Justify your
answer.
1. x2 + y2 + 4 = 0
2. x2 + y2 - 20 = 0
3. x2 + y2 + 8x + 16 = 0
4. x2 + 6x = y2 - 25
5. x² + y² – 4 = 4x – 10y 3 xtce y=-1
Guide Questions:
1. How was the activity?
2. Were you able to identify which are circles and which are not?
3. How?
napaka unfair Naman po walang sumasagot Ng tanungko​