Question

05] The centre of a circle is (20-1,7) and it passes through the point (-3,-1). If the
diameter of the circle is 20 units, find the value of p.​

Answer 1

Step-by-step explanation:

Centre: C(2a−1,7)

Point: P(−3,−1)

Radius=21(20)=10

As circle passes through P, distance between p and centre is equal to radius.

=>(PC)2=(10)2=>(2a−1+3)2+(7+1)2=(10)2=>(a+1)2=436=>(a+1)2=9=>a=2,−4