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= (p × l) + (1/2 × 1/4 × π × D²)
= ( 16cm × 14 cm) + (1/8 × 22/7 × 14²)
= 224cm² + (1/8 × 22/7 × 196cm²)
= 224cm² + (1/8 × 616cm²)
= 224cm² + 77cm²
= 301cm²
4. Luas setengah lingkaran + luas segitiga
= ( 1/2 × 1/4 × π × D²) + ( 1/2 × a × t )
= ( 1/8 × 22/7 × 28²) + ( 1/2 × 28 × 12 )
= ( 1/8 × 22/7 × 784) + ( 14 × 12 )
= ( 1/8 × 2464 ) + 168cm²
= 308cm² + 168cm²
= 476cm²
maaf kalau salah takutnya 14 dan 28 itu jari-jari