Tentukan nilai x nya

Jawab:

Buat garis bantu CF yg sejajar dgn AB & DE (gambar terlampir)

∠ABC + ∠BCF = 180°

32° + ∠BCF = 180°

∠BCF = 148°

∠FCD + ∠CDE = 180°

46° + ∠CDE = 180°

∠CDE = 134°

∠BCF + ∠CDE + x = 360°

148° + 134° + x = 360°

x = 78°