Goldenrod Questions 1.Draw a pair of adjacent angles. (label) 2.Draw a pair of adjacent angles that are also complementary. (label) 3.Draw a pair of adjacent angles that are also supplementary. (label) 4.Name 4 pair of adjacent angles.

Congruent angles are angles that have the same measure. In the diagram, mABC = mDEF, so you can write ABC  DEF. This is read as “angle ABC is congruent to angle DEF.” Arc marks are used to show that the two angles are congruent. The Angle Addition Postulate is very similar to the Segment Addition Postulate that you learned in the previous lesson. Constructing Congruent Angles

This is the given angle. Step 1:Draw a ray (use a straightedge.) Step 2:Open your compass (your choice of how large) Step 3:Make an arc on the given angle and on your ray. Step 4:Mark intersection points as B and C on given angle. X A B C Step 5:Open compass so that it is as wide as the distance from B to C.

This is the given angle. A X B C Step 6:Keep compass measurement and mark arc on your new angle by placing your compass in the intersection of the red arc and your ray. Step 7:Connect the intersection of the green arc and red arc to point X. Homework: Construction wkst