L∆1
a . t . ½
= 14 . 16 . ½
= 112
..
L∆2
= 14 . 9 . ½
= 63
...
L∆3
= 14 . 5 . ½
= 35
L. arsir = L∆1 + L∆2 - 2L∆3
= 112 + 63 - 70
= 105 cm²
Jadi jawabannya A
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L∆1
a . t . ½
= 14 . 16 . ½
= 112
..
L∆2
a . t . ½
= 14 . 9 . ½
= 63
...
L∆3
a . t . ½
= 14 . 5 . ½
= 35
...
L. arsir = L∆1 + L∆2 - 2L∆3
= 112 + 63 - 70
= 105 cm²
Jadi jawabannya A