1) in DOS what side is included of S and O
A.DO
B.DS
C.SD
D.SO
2)SUM ,PRO which angle is congruent to U?
A.S
B.R
C.P
D.O
3) which is true about the sector of the vertex angle of an isosceles triangle?
A. it is parallel to the base
B. it is parallel to the left leg
C. it is coin siding to the base
D.it is perpendicular to the base at its midpoint
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Answer:
A. DO
B. S
A.-it is parallel to the base