a. k 1 = 4 x s= 40 cm
k 2 = 3,14 x 10 = 31,4
daerah diarsir = 40-31,4= 8, 6 cm
semoga membantu
A.-Lpersegi=s×s
=10×10
=100 cm²
-Ldaerah yg tidak diaksir=b1+b2+b3=1 lingkaran penuh
-Llingkaran=π×r×r
=3,14×5×5
=78,5
-Lp-Ll
=100-78,5
=21,5 cm²
Maaf klo salah.....
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a. k 1 = 4 x s= 40 cm
k 2 = 3,14 x 10 = 31,4
daerah diarsir = 40-31,4= 8, 6 cm
semoga membantu
A.-Lpersegi=s×s
=10×10
=100 cm²
-Ldaerah yg tidak diaksir=b1+b2+b3=1 lingkaran penuh
-Llingkaran=π×r×r
=3,14×5×5
=78,5
-Lp-Ll
=100-78,5
=21,5 cm²
Maaf klo salah.....