Jawaban:
C
Penjelasan dengan langkah-langkah:
L bangun I (1/2 ling) = 1/2 x phi x r x r
=1/2 x 22/7 x 21 x 21
= 693 cm²
L bangun II (sgtg) = 1/2 x a x t
= 1/2 x 42 x 20
= 420 cm²
L bangun datar = L I + L II = 693 + 420 = 1.113 cm²
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Jawaban:
C
Penjelasan dengan langkah-langkah:
L bangun I (1/2 ling) = 1/2 x phi x r x r
=1/2 x 22/7 x 21 x 21
= 693 cm²
L bangun II (sgtg) = 1/2 x a x t
= 1/2 x 42 x 20
= 420 cm²
L bangun datar = L I + L II = 693 + 420 = 1.113 cm²