kak tolong dijawab nomer 3 sama 4 ya tolong nomer 4 pakek caranya

3.B
4.1/2×a×t
1/2×24×18
12×18
:316cmkuadrat

3. B
4. 1/2 x a x t
= 1/2 x 24 x 18
= 1/2 : 432
= 216 cm²

semoga membantu ya....