Chapter 10

Question 0

Two secant or chords intersect inside the circle

Answer 0

M /_ 1= 1/2(mAB + mCD)

Question 1

Arc Length

Answer 1

Central angle
____________ X diameter (2rpi)
360

Question 2

If two secants, a secant and a tangent, or two tangents intersect outside the circle

Answer 2

m/_ A= 1/2( m DE- m BC)

Question 3

If a secant and a tangent interest on the circle

Answer 3

m /_ 1= 1/2• m AB

Question 4

If two chord intersect in a circle, then the products of the length of the chord segments are equal

Answer 4

AB•BC=DB•BE

Question 5

If two secants intersect in the exterior of the circle then the product of one secant segment and its external secant segment is equal to the product of the measures of the other secant and its external secant segment

Answer 5

AC•AB=AE•AD

Question 6

If the tangent and a secant intersect in the exterior of a circle then the square of the measure if the tangent is equal to the product of the measures if the secant and its external segment

Answer 6

JK^2= JL•JM

Question 7

Completing a square

Answer 7

Find one half of b

Square the result in step one

Add the result of step two to x^2+bx

Question 8

Find the equation of the circle given three points

Answer 8

Put all three coordinates into the circle formula in the x and y spots

Do a system of equations to find the h and then the k.

Find the r by doing the distance formula from the center to one of the points

Question 9

Distances formula

Answer 9

Radical ([x2]-[x1])^2 + ([y2]-[y1])^2

Question 10

Quadratic formula

Answer 10

-b +/- radical b^2 - 4ac
_____________________
2a