tlong y yang aku beri lingkaran plissss y ^_^

1) Luas bangun datar yg diarsir = L.persegi - L.lingkaran
     L.Persegi = s × s
                       = 36 cm × 36 cm
                       =      1.296 cm²
     L.Lingkaran = π × r²
                           = 22/7 × 14²
                           = 22/7 × 14 × 14
                           = 22    × 2   × 14
                           =     616 cm²
     Luas bangun datar yg diarsir = L.persegi - L.lingkaran
                                                       = 1.296 cm² - 616 cm²
                                                       =             680 cm²
3) Luas bangun datar = L.trapesium + L.1/2 lingkaran
     Luas Trapesium = 1/2 × jml sisi sejajar × tinggi
                                  = 1/2 × (14cm + 20cm) × 7 cm
                                  = 1/2 ×        34 cm          × 7 cm
                                  =         17 cm                   × 7 cm
                                  =                          119 cm²
     Luas 1/2 Lingkaran = 1/2 × π × r²
                                       = 1/2 × 22/7 × (d÷2)²
                                       = 1/2 × 22/7 ×    7²
                                       = 1/2 × 22/7 × 7 × 7
                                       = 1/2 × 22           × 7
                                       =     11                 × 7
                                       =             77 cm²
     Luas bangun datar = L.trappesium + L.1/2 lingkaran
                                      =     119 cm²      +       77 cm²
                                      =                  196 cm²
4) Luas bangun datar yg diarsir = L.persegi panjang - L.belah ketupat
     Luas Persegi Panjang = p × l
                                            = 10 cm × 8 cm
                                            =       80 cm²
     Luas Belah Ketupat = (d1 × d2)÷ 2
                                        = ((10-4)×(8-4))÷ 2
                                        = (6cm × 4cm) ÷ 2
                                        =       24 cm²     ÷ 2
                                        =            12 cm²
     Luas bangun datar yg diarsir = L.persegi panjang - L.belah ketupat
                                                       =         80 cm²            -        12 cm²
                                                       =                            68 cm²