12. In a triangle ABC, AB = 8cm, BC = 5 cm, CA= 4cm, then
1) The greatest angle of a triangle is Z C.
2)The least angle of the triangle is ZB
3) The descending angles of the triangle is ZC, ZA, ZB 4) ZA+B= 90°
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Answer:
1) The greatest angle of a triangle is ZC
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