" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
√s(s-a)(s-b)(s-c)
keterangan
s = 1/2 keliling
a,b,c = nama2 sisi2 nya
s = 1/2 (12+9+5) = 1/2 (26) = 13
luas, maka
√13(13-12)(13-9)(13-5)
√13(1)(4)(8)
√13(32)
√416
√2² x 2² x 2 x 13
√4² x 2 x 13
√4² x √2x13
4√26 cm²