Lake cara Ya Mksh no.18

Rumus LPP = P×l
= 21× 5 = 105
Rumus trapesium
=½×(a+b) ×t
=½×(13+21)×3
= ½(34)×3
= 51
------------105+51 = 156-------------------
++++Jika ada kesalahan atau tdk faham mohon berkomentar ++++++

[tex]luas \: trpesium = \\ \frac{1}{2} \times (a + c) \times t \\ \frac{1}{2} \times ( 21+ 13) \times3 \\ \frac{1}{2} \times 34 \times 3 \\ 17 \times 3 \\ 51 \\ luas \: persegi \: panjang = \\ = p \times l \\ = 21 \times 5 \\ = 105 \\ luas \: seluruhnya = \\ 51 + 105 \\ = 156 \: cm {}^{2} [/tex]