pake rumus dan cara tolong dijawab no 6.7.8

6) L.layang-layang
=½×D1×D2
=½×(6+15)×(8×2)
=½×21×16
=168cm²

7) AC
=L/BD×2
=250/(10×2)×2
=250/20×2
=25cm

8) t.trapesium
=L/(a+b)×2
=3.060/(70+100)×2
=3.060/170×2
=36m

semoga membantu