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pq = √25² - 7²
= √ 625 - 49
= √ 576
= 24
jawaban nomer 24
d = √ p² - ( R+r)²
= √ 20² - ( 7+5)²
= √ 400 - 12²
= √ 400-144
= √ 256
= 16 cm²