Tolong bantu kak yg bener pliss​

Penyelesaian soal.

→ Rumus Keliling ½ lingkaran

= ½ × 2 × π × r

→ Rumus Keliling Persegi panjang

= 2 ( p + l )

———————————————————–

→ Keliling Gabungan

= ( Keliling ½ lingkaran ) + ( Keliling Persegi panjang )

= ( ½ × 2 × π × r ) + ( 2 ( p + l ))

= ( ½ × 2 × 3,14 × ( 25 : 2 )) + ( 2 ( 40 + 25 ))

= ( 1 × 3,14 × 12,5 ) + ( 2 × 65 )

= 39,25 + 130

= 169,25 cm