pls bantu ya pake cara , jawaban yg bener

L. T1 : 1/2*(a+b) *t = 1/2* (42+(42+30))*30 = 1/2 * (42+72) * 30 = 1/2 * 114 *30 = 1.710 cm'2

L. T2 : 1/2*(45+(45-30))*30 = 1/2*(45+15)*30 = 1/2 * 60 * 30 = 900 cm'2

L. bangun datar = 1.710+900= 2.610 cm'2