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= √169-144
= √25
= 5 cm → triple phytagoras 13, 12,5
3. a) p = √10²-8²
= √100-64
= √36
= 6 cm → triple phytagoras 5, 4, 3
b) p = √25²-5²
= √625-25
= √600
= √100.6
= 10√6 cm
c) p = √20²-16²
= √400-256
= √144
= 12 cm → triple phytagoras 5, 4, 3
d) p = √30²-18²
= √900-324
= √576
= 24 cm → triple phytagoras 5, 4, 3
=900-324
=576
=24(akar dari 576)