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panjang OA = panjang OB
√OA² + OB² = 10√2
OA² + OB² = (10√2)²
karena panjang OA = panjang OB, maka bisa menjadi :
2OA² = (10√2)²
2OA² = 100.2
2OA² = 200
OA² = 200 / 2
OA² = 100
OA = √100
OA = 10 cm
luas seperempat lingkaran = 1/4 . πr²
= 1/4 . 3,14 . 10²
= 1/4 . 3,14 . 100
= 1/4 . 314
= 78,5 cm²
luas segitiga = 1/2 at
= 1/2 . 10 . 10
= 5 . 10
= 50 cm²
luas tembereng = 78,5 - 50
= 28,5 cm²
jari2 = 10
tembereng =