Luas belah ketupat=
dia × dia ÷ 2 =14 × 14 ÷ 2
=98 cm2
Luas lingkaran =
phi × r × r × 1/4 × 2
22/7×7×7×1/4×2 = 77cm2
98-77=21 cm2
ok
r = 14 cm
s = 2 × r
s = 2 × 14
s = 28 cm
L daerah yang diarsir
= L persegi - 1/2 L lingkaran
= (s × s) - (1/2 × phi × r × r)
= (28 × 28) - (1/2 × 22/7 × 14 × 14)
= 784 - 308
= 476 cm^2
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Luas belah ketupat=
dia × dia ÷ 2 =14 × 14 ÷ 2
=98 cm2
Luas lingkaran =
phi × r × r × 1/4 × 2
22/7×7×7×1/4×2 = 77cm2
98-77=21 cm2
ok
r = 14 cm
s = 2 × r
s = 2 × 14
s = 28 cm
L daerah yang diarsir
= L persegi - 1/2 L lingkaran
= (s × s) - (1/2 × phi × r × r)
= (28 × 28) - (1/2 × 22/7 × 14 × 14)
= 784 - 308
= 476 cm^2