Lesson 3-3Lesson 3-3The Angle Addition PostulateThe Angle Addition Postulate

Ohio Content Standards:

Ohio Content Standards:

Estimate and compute various attributes, including length, angle measure, area, surface area and volume, to a specified

level of precision.

Ohio Content Standards:

Formally define geometric figures.

Ohio Content Standards:

Formally define and explain key aspects of geometric figures.

Postulate 3-3Angle Addition Postulate

(A-A Postulate)

Postulate 3-3Angle Addition Postulate

(A-A Postulate)

For any angle PQR, if A is in the interior of PQR, then

m PQA + m AQR = m PQR.

If m KNL = 110 and m LNM = 25, find m

KNM.

KM

L

N

25°

110°

Find m 2 if m 1 = 75 and m ABC = 140.

AC

D

B

21

Find m JKL and m LKM if m JKM = 140.

JM

L

K

4x°

(2x – 10)°

Angle Bisector

Angle Bisector

Separates the angle into Separates the angle into two angles of equal two angles of equal

measure.measure.

If FD bisects CFE and m CFE = 70, find

m 1 and m 2.C

E

D

F

21

HomeworkHomework

Pgs. 108-109 12-22 evens,

27-29 all