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setengah diagonal = 24cm
Setengah diagonal satunya
Diagonal satunya = 2 x 10 = 20cm
b. Luasnya =
1/2 d1 = 48/ 2 = 24 cm
26^2 - 24^2 = 1/2 d2^2
676 - 576 = 1/2 d2x^2
100 = 1/2 d2^2
1/2 d2 = 10
jadi d2 = 2 x 10 = 20 cm
L KLMN = 1/2 ( d1 x d2 )
= 1/2 ( 48 x 20 )
= 480 cm2