B 1300
A, B, C and D are points on a circle, centre O.
BC = CD.
Angle BCD= 130°
(a) Write down the size of angle BAD.
Give a reason for your answer.
Because angle
in a cyclical
cyclical quadrica
adds up to 180°
Soo
(b) Work out the size of angle ODC.
Give reasons for your answer.​

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi