Jawab:
1.) Rumus keliling = jumlahkan semua sisinya
Gambar ke 1 = 7+7+9+9+(9x2+6)+19+(19-7)+(6+9)+5+5
= 14 + 81 + 24 + 19 + 12 + 15 + 25
= 190 cm
Gambar ke2 = 16+(16+9)+12+11+11+15
= 16 + 25 + 12 + 121 + 15
= 189 cm
2.) Luas persegi = Sisi x sisi
= 10 x 10 = 100 cm²
Luas trapesium = ½ x (alas a + alas b) x tinggi
= ½ x (10+22) x 8
= ½ x (32) x 8
= 32 x 4
= 128 cm²
Luas gabungan = 100 + 128 = 228 cm²
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Jawab:
1.) Rumus keliling = jumlahkan semua sisinya
Gambar ke 1 = 7+7+9+9+(9x2+6)+19+(19-7)+(6+9)+5+5
= 14 + 81 + 24 + 19 + 12 + 15 + 25
= 190 cm
Gambar ke2 = 16+(16+9)+12+11+11+15
= 16 + 25 + 12 + 121 + 15
= 189 cm
2.) Luas persegi = Sisi x sisi
= 10 x 10 = 100 cm²
Luas trapesium = ½ x (alas a + alas b) x tinggi
= ½ x (10+22) x 8
= ½ x (32) x 8
= 32 x 4
= 128 cm²
Luas gabungan = 100 + 128 = 228 cm²