Diketahui: jajar genjang mempunyai :
a=26cm
t=13cm
Ditanya:keliling?
Misal :sisi miring =sm
Jwb:sm= √t²+(a-20)²
=√13²+(26-20)²
=√13²+6²
=√169+36
= √205
= 14, 31(dibulatkan menjadi 14)
Sm=14cm
Keliling = 2(p+l)
=2(26+14)-----> (panjang alas)
=2×40
=80cm
Jadi keliling jajar genjang =80 cm
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Diketahui: jajar genjang mempunyai :
a=26cm
t=13cm
Ditanya:keliling?
Misal :sisi miring =sm
Jwb:sm= √t²+(a-20)²
=√13²+(26-20)²
=√13²+6²
=√169+36
= √205
= 14, 31(dibulatkan menjadi 14)
Sm=14cm
Keliling = 2(p+l)
=2(26+14)-----> (panjang alas)
=2×40
=80cm
Jadi keliling jajar genjang =80 cm