Circles Test

Question 1

What is true about 2 congruent circles?

Answer 1

2 chords in congruent circles are congruent if and only if their corresponding arcs are congruent

Question 2

What is the formula for the Inscribed Angle Theorem?

Answer 2

inscribed angle = 1/2 • central angle

Question 3

Given an arc measure, how do you find an angle measure??

Answer 3

Divide the arc measure by 2

Question 4

What is the arc addition postulate?

Answer 4

States that the measure of an arc formed by 2 adjacent arcs is the sum of the measures of the 2 arcs

Question 5

What is a semicircle?

Answer 5

are the endpoints of a diameter

Question 6

What is the inscribed quadrilateral theorem?

Answer 6

If a quad. is inscribed in a circle, then its opposite angles are supplementary

Question 7

What is the tangent radius theorem

Answer 7

If a line is tangent to a circle and then it is perpendicular to a radius

Question 8

What is the chord-chord theorem?

Answer 8

Short • short = short • short

Question 9

What is The secant-secant theorem?

Answer 9

Whole•beak = whole•beak

Question 10

To find the angle on a circle, what do you do?

Answer 10

Divide the arc measure by two

Question 11

To find the angle measure inside a circle, what do you do you?

Answer 11

Add the 2 arc measures and divide by 2

Question 12

To find the angle measure outside of a circle, what do you do?

Answer 12

Subtract the 2 arc measures and divide by 2