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## Tuesday, August 13th

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**Tuesday, August 13th**Identify each shape 1. H is between I and J. JI = 25 and IH = 13. Find HJ. _____ 2. Find each measurement**Homework Answers**Please ask if you have questions!**Angle Exploration**Need: • Paper • Protractor • Lined sheet of paper**Discussion**7. What did you notice about the measure of <ABC? 8. What was the relationship between measures of <ABC, <ABD, and <DBC? Always 90˚ m<ABD + m<DBC=m<ABC**An angleis a figure formed by two rays, or sides, with a**common endpoint called the vertex(plural: vertices). You can name an angle several ways: by its vertex by a point on each ray and the vertex by a number.**The set of all points between the sides of the angle is the**interior of an angle. The exterior of an angleis the set of all points outside the angle. Angle Name R, SRT, TRS, or 1**Example 1**A surveyor recorded the angles formed by a transit (point A) and three distant points, B, C, and D. Name three of the angles. Possible answer: BAC CAD BAD**Example 2**Write the different ways you can name the angles in the diagram. RTQ, T, STR, 1, 2**The measureof an angle is usually given in degrees. Since**there are 360° in a circle, one degreeis of a circle. When you use a protractor to measure angles, you are applying the following postulate.**Practice!**Draw 2 angles and measure with your protractor!**Reminder!**Congruent angles are angles that have the same measure. In the diagram, mABC = mDEF, 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.**Part 3: Constructing Angles**http://www.youtube.com/watch?v=YphAYfe6J40**Example #1- Let’s try together!**Use your notes from Friday!!!! “sharp point” = Bullseye end of compass**Example #2- You Try!**Use your notes from Friday!!!! “sharp point” = Bullseye end of compass**Homework**Practice A Worksheet