3. What is the length of BC? A、5 B.10 C. 26 D.30 4. Find the measure of mangle DBC ,, If Boverline D bisects angle ABC A. 27 ° B. 300 C. 57 ° D. 900 5. If overline GI bisects angle HGJ , and HI= Ioverline J=9 , and mangle HGI=30 , What is mangle IGJ ? A. 300 B. 600 C. 900 D. 120 °
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