Diketahui
AC = 20 cm
AB = 21 cm
CD = 12 cm
Hence,
AD² = AC² - CD²
AD² = 20² - 12²
AD² = 400 - 144
AD² = 256
AD = √256
AD = 16 cm
BD = AB - AD
BD = 21 - 16
BD = 5 cm
BC² = BD² + CD²
BC² = 5² + 12²
BC² = 25 + 144
BC² = 169
BC = √169
BC = 13 cm
Penjelasan dengan langkah-langkah:
KESEBANGUNAN dalam SEGITIGA
CD = AC × BC
AB
BC = CD × AB
AC
BC = 12 × 21
20
BC = 252
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Diketahui
AC = 20 cm
AB = 21 cm
CD = 12 cm
Hence,
AD² = AC² - CD²
AD² = 20² - 12²
AD² = 400 - 144
AD² = 256
AD = √256
AD = 16 cm
BD = AB - AD
BD = 21 - 16
BD = 5 cm
BC² = BD² + CD²
BC² = 5² + 12²
BC² = 25 + 144
BC² = 169
BC = √169
BC = 13 cm
Penjelasan dengan langkah-langkah:
KESEBANGUNAN dalam SEGITIGA
CD = AC × BC
AB
BC = CD × AB
AC
BC = 12 × 21
20
BC = 252
20
BC = 12,6 cm