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=
=
= √576
= 24 cm
OPRQ layang" garis singgung
L = r x s
= 7 x 24
= 168 cm²
garis singgung selalu tegak lurus dengan jari² r
OP = r = 7 cm dan OR = 25 cm
OR² = r² + QR²
25² = 7² + QR²
625 = 49 + QR²
QR = √576 = 24 cm
semoga membantu......