Penjelasan dengan langkah-langkah:
LKN = LMN
3y + 23° = y + 61°
3y - y = 61° - 23°
2y = 38°
y = 38÷2
Y = D. 19°
s persegi = 20 cm
r lingkaran = 20÷2 = 10 cm
L arsir = L persegi - L lingkaran
L = 20×20 - 3,14 x 10²
L = 400 - 3,14×100
L = 400-314
L = D. 86 cm²
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Penjelasan dengan langkah-langkah:
1.)
LKN = LMN
3y + 23° = y + 61°
3y - y = 61° - 23°
2y = 38°
y = 38÷2
Y = D. 19°
2.)
s persegi = 20 cm
r lingkaran = 20÷2 = 10 cm
L arsir = L persegi - L lingkaran
L = 20×20 - 3,14 x 10²
L = 400 - 3,14×100
L = 400-314
L = D. 86 cm²