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diagonal AC = 8√2
AO=4√2
T ke ABCD = TO
TO² = TA² - AO²
= 144 -32
TO = 4√7
AO = 1/2 . 8√2
AO = 4√2 cm
TO = TA² - AO²
TO = 12² - (4√2)²
TO = 144 - 32
TO = √112
TO = 4√7 cm
semoga membantu ya
jadikan jawaban terbaik ya, terimakasih ^^