TAB 1 TAB 1 TAB 1 TAB 1 Geometry/Trig Name: __________________________

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TAB 1 TAB 1 TAB 1 TAB 1 Geometry/Trig Name: __________________________ Unit 8 GSP Circles Lab Date: ___________________________ Circles Day 2 - Sections 9-3, 9-4 Theorem 9-4 TAB 1 Sketch the diagram: Fill in the Measurements: AB BC mAGB mBHC TAB 1 Conclusion (Theorem 9-4): In the same circle or in congruent circles, congruent chords intercept ___________________ arcs. Examples: Find all angle and arc measures. mÐCAB = 40 mÐACB = ________ mÐABC = _______ mAB = 140 mAC = __________ mCB = _________ A B C TAB 1 Q is the center of the circle. mAB = 86 mDC = _______ mÐDQC = ______ Classify DDQC by sides: _____________ mBC = 128 mBAC = ___________ A B C D Q TAB 1

Circles Day 2 (Sections 9-3, 9-4) – page 2 Geometry/Trig Unit 8 GSP Circles Lab Circles Day 2 (Sections 9-3, 9-4) – page 2 Theorem 9-5 TAB 2 Sketch the diagram: Fill in the Measurements: AF FB mAGC mBHC TAB 2 Conclusion (Theorem 9-5): A diameter that is perpendicular to a chord _________________ the chord and its intercepted arc. Examples (Q is the center of each circle). Given: QJ = 3, QL = 3, KP = 8 R M S T Q 15 17 P RT = ________ QM = ________ QS = ________ MS = ________ SP = ________ TAB 2 mAB = _______ mAC = _______ mCB = _______ mÐAQC = _______ mÐAQB = _______ mÐABQ = _______ Q B C A D mADB = 220 F JP = _______ NM = _______ LM = _______ LN = _______ QM = _______ QK = _______ (d) mÐQNL = __________ TAB 2 (d) Challenge: If QC = 10, find AB.