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Lpp = 17 x 13 = 221 cm²
Ls= 15 x 13 / 2
= 195 / 2
= 97,5 cm²
Luas= 221 + 97,5 = 318,5cm²
b. sisi miring segitiga = √15²+13²
=√225+169
=√389
= 17cm
Keliling = 13+17+15+17+17
= 69cm
=
=
=
= 318,5
b. K = 13 + 17 + 15 + 19,8 + 17
= 81,8