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op=26cm
>pq²=op²-oq²
=26²-10²
=676-100
=576
pq=√576
=24
2. or=40cm (jari jari)
rq=42cm (sisi miring)
a. oq²=or²+rq²
=40²+42²
=1600+1764
=3364
oq=√3364
=58cm
b. LΔ OQR = 1/2 . a . t
= 1/2 . 40 . 42
= 20 .42
= 840 cm²
c. L OPQR = 2 . LΔ
= 2 . 840
= 1680 cm²