Tolong dijawab ya...besok dikumpul..no 22 & 23

NO.22 ) Luas ¼ lingkaran
= ¼ x phi x r²
= ¼ x 22/7 x 28 cm x 28 cm
= ¼ x 88 cm x 28 cm
= 22 cm x 28 cm
= 616 cm² [ C ]

NO.23 ) Keliling Bangun
= ( keliling ½ lingkaran ) + ( keliling trapesium )
= ( ½ x 2 x phi x r ) + ( a + b + c + d )
= ( ½ x 2 x 3,14 x 10 cm ) + ( 35 cm + 20 cm + 20 cm + 25 cm )
= 31,4 cm + 100 cm
= 131,4 cm

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