t² = √(15²-13)
t² = √(225-169)
t² = √56
t = 7,4 cm
Luas segitiga :
L => 1/2 x (a x t)
L => 1/2 x (7,4 x 15)
L => 1/2 x 111
L => 55,5 cm²
t² = a² - s²
t² = 15² - 13²
t² = ( 15 × 15 ) - ( 13 × 13 )
t² = 225 - 169
t² = 56
t = √56
t = √4 × √14
t = 2 × √14
t = 2√14 cm
½ × alas × tinggi
½ × 15 × 2√14
1 × 15 × 1√14
15 × √14
15√14 cm²
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t² = √(15²-13)
t² = √(225-169)
t² = √56
t = 7,4 cm
Luas segitiga :
L => 1/2 x (a x t)
L => 1/2 x (7,4 x 15)
L => 1/2 x 111
L => 55,5 cm²
t² = a² - s²
t² = 15² - 13²
t² = ( 15 × 15 ) - ( 13 × 13 )
t² = 225 - 169
t² = 56
t = √56
t = √4 × √14
t = 2 × √14
t = 2√14 cm
½ × alas × tinggi
½ × 15 × 2√14
½ × 15 × 2√14
1 × 15 × 1√14
15 × √14
15√14 cm²