Jawaban yang C tolong

Jawaban yang C tolong

Jawaban:

${bd}^{2} = {ab}^{2} + ae {}^{2} \ {bd}^{2} = {12}^{2} + {9}^{2} \ bd {}^{2} = 144 + 81 \ {bd}^{2} = 225 \ bd = sqrt{225} \ bd = 15cm$

${hb}^{2} = {bd}^{2} + {dh}^{2} \ {hb}^{2} = {15}^{2} + {8}^{2} \ {hb}^{2} = 225 + 64 \ {hb}^{2} = 289 \ hb = sqrt{289} \ hb = 17cm$

$l = frac{bd times dh}{2} \ = frac{15 times 8}{2} \ = frac{120}{2} \ = 60cm {}^{2}$