tolong Y kak No 1-5 sama caranya

1. L=1/2×a×t
=1/2×17×28
=1/2×476
=238

2. L=1/2×d1×d2
=1/2×22×17
=1/2×374
=187

3. T=L:(a+b)
=312:(15+24)
=312:39
=8

4. V=1/2×a×b×t
=1/2×28×34×16
=1/2×15232
=7616