Matematika

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tolong pake cara yaaa
tolong pake cara yaaa

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  • a. AD=√26^2-10^2
    = √676-100
    = √576
    = 24cm
    BD= 24-15 = 9cm
    BC=√10^2+9^2
    BC=√100+81
    BC=√181 atau 13,453

    b. 1/2.a.t
    =1/2.15.10 =75cm^2

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