Tolong bantu y ....mohon

no 6 masukin aja le rumus rumusnya=d1xd2:2=?

kalo nomor lain aku kurang tahu
maaf ya

m5)keliling =4.s
=4.10
=40 cm
luas abc = ab kuadrat =ca-bc
= ab ______ =16 kuadrat- 10 kuadrat
= ab ______ =256-100
= ab ______ =156
= ab =/156
= ab = 12
luas= 1/2× d1 ×d2
1/2×12×16
6×16
96cmkuadrat