L ABCFG = L persegi panjang - L 1/2 lingkaran = (p x l) - (1/2 x π x r x r) = (63 x 42) - (1/2 x 22/7 x 21 x 21) = 2646 - (11 x 3 x 21) = 2646 - 693 = 1953 cm^2
L CEF = L 1/4 lingkaran = 1/4 x π x r x r = 1/4 x 22/7 x 42 x 42 = 1/2 x 11 x 6 x 42 = 11 x 3 x 42 = 1386 cm^2
L CED = L segitiga = 1/2 x a x t = 1/2 x 42 x 42 = 21 x 42 = 882 cm^2
L gabungan = L ABCFG + L CEF + L CED = 1953 + 1386 + 882 = 4221 cm^2 (C).
Verified answer
Bangun DatarL ABCFG = L persegi panjang - L 1/2 lingkaran
= (p x l) - (1/2 x π x r x r)
= (63 x 42) - (1/2 x 22/7 x 21 x 21)
= 2646 - (11 x 3 x 21)
= 2646 - 693
= 1953 cm^2
L CEF = L 1/4 lingkaran
= 1/4 x π x r x r
= 1/4 x 22/7 x 42 x 42
= 1/2 x 11 x 6 x 42
= 11 x 3 x 42
= 1386 cm^2
L CED = L segitiga
= 1/2 x a x t
= 1/2 x 42 x 42
= 21 x 42
= 882 cm^2
L gabungan = L ABCFG + L CEF + L CED
= 1953 + 1386 + 882
= 4221 cm^2 (C).
*semoga membantu. sukses selalu ^_^