100 Hikes / Travel Guide: Southern Oregon & Northern California

100 Hikes / Travel Guide: Southern Oregon & Northern California

Matematika Q. mathI~


Di gambar, mr bnt soal orank ;-;​

Q. mathI~


Di gambar, mr bnt soal orank ;-;​

dik : sisi ( s ) = 20 cm

alas ( a ) = 36 cm

dit : luas alas..?

jawab :

• luas = 36 × 20

= 720 cm²

• luas segitiga alasnya ( 36 cm )

= L : 36 × 26

—————

2

: 468 cm ²

• luas segitiga sisinya ( 20 cm )

= L : 20 × 30

—————

2

= 300 cm ²

maka :

= luas + 2 ( alas ) + 2 ( sisi )

= 720 + 2 ( 468 ) + 2 ( 300 )

= 720 + 936 + 600

= 2.256 cm ²

opsi a. 2.256 cm ²

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