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Jawaban:

CD²=5²-4²

CD²=25-16

CD³=9

CD=√9=3

Luas=1/2×a×t

=1/2×6×3 =9cm

semoga membantu, jadikan jawaban terbaik, thanks

Mencari CD =

b² = c²-a²

b² = 5²-4²

b² = 25 – 16 = 9

b = √9 = 3

L ∆BCD = ½.a.t = ½.4cm.3cm = 6cm²

L ∆ACD = ½.a.t = ½.2cm.3cm = 3cm²

L seluruhnya = 6cm²+3cm² = 9cm²

semoga membantu