1) 3a-8a= a) 2a b) 4a c) 5a d) 3a 2) 8a-5a+3a a) 4a b) 5a c) 3a d) 6a 3) the meeting of two half-rights with the same origin. a) right b) angle c) perimetre d) point 4) the geometric figure formed by the three segments determined by three non-collinear points. a) traiangle b) circle c) romb d) collination 5) 5a+(7a+10a-3a)= a) 1a b) 11a c) 19a d) 18a

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