Can someone please help me with these questions i already got the equation to the circle i just need help with the questions on the right please and thank you

Question

anonymous · Answer

attachment

triciaal · Answer

hope this helps
(-2)^2 + (-4)^2 = 4 + 16 so r = rt 20 rt 4 rt5 = 2rt5
bk = ak = 2rt5
bc = ac = 7
100/2*pi*r = akb/360
adb = 360-100 = 260

tan (1/2 akb) = bc/bk = 7/4.47=1.565 1/2 akb = 57 so akb = 57*2 = 114

triciaal · Answer

acb =(90 -57)*2 = 33*2 = 66

triciaal · Answer

area of sector = 100/360 *pi*20

anonymous · Answer

thank you for helping sorry it took me so long to reply i just got my internet back