hitung lah luas tembereng PD gambar berikut jika jari jari 14 cm

L tembereng= 60°/360° × K lingkaran

K lingkaran= 2πr
K= 2.22/7.14
K= 88 cm
--------
60°/360° = 1/6

L tembereng= 1/6 x 88 cm
= 14,6 cm

Maaf kalau salah

[tex]
L_{lingkaran} = \pi \times r^2\\
L_{lingkaran} = \frac {22}{7} \times 14^2\\
L_{lingkaran} = 616\\
L_{AOB} = \frac {90}{360} \times 616\\
L_{AOB} = 154\\
L_\Delta = \frac {14 \times 14}{2}\\
L_\Delta = 98\\
\text {jadi, luas tembereng adalah}\\
L_{tembereng} = L_{AOB} - L_\Delta\\
L_{tembereng} = 154 - 98 = 56 cm^2

[/tex]