Please guys help me l will give you the brainliest if you give me the correct answers. Please show the working.​

180° is galf a full turn, so it takes 1/2 less time that is 20 seconds

90° is 1/4 of a full turm (360°), so it will take (1,4)×40= 10 seconds

45° is 1/8 of 360, so it will take 5 seconds

270° IS 3/4 pf 360°, so the answer is (3/4)×40 = 30 seconds

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110