Penjelasan dengan langkah-langkah:
1) Keliling = 22/7 x 14/2 + 14 + 2 x 30
= 22 + 14 + 60
Luas = 14 x 30 – 22/7 x (14/2)²/2
= 420 – 22/7 x 49/2
= 420 – 77
2) AOB = 80°
ACB = ADB = ½ AOB.
ACB = ADB = ½ x 80
ACB = ADB = 80/2
3) POQ = 180 – 2 x 50
POQ = 180 – 100
PRQ = ½ POQ
PRQ = ½ x 80
PRQ = 80/2
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Penjelasan dengan langkah-langkah:
1) Keliling = 22/7 x 14/2 + 14 + 2 x 30
= 22 + 14 + 60
= 96 cm
Luas = 14 x 30 – 22/7 x (14/2)²/2
= 420 – 22/7 x 49/2
= 420 – 77
= 343 cm²
2) AOB = 80°
ACB = ADB = ½ AOB.
ACB = ADB = ½ x 80
ACB = ADB = 80/2
ACB = ADB = 40°
3) POQ = 180 – 2 x 50
POQ = 180 – 100
POQ = 80°
PRQ = ½ POQ
PRQ = ½ x 80
PRQ = 80/2
PRQ = 40°