An angle whose vertex lies outside of the circle, but whose sides touch the circle is a

central angle

circumscribed angle

inscribed angle

2.

To find the measure of a circumscribed angle, subtract the measure of the associated central angle from

90°

180°

270°

360°

3.

What was the measure of ∠ABC?

10°

170°

180°

a

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?