berapakah alas segitiga sama kaki jika tingginya 13 cm dan luasnya 52cm?
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Luas = ½ × alas × tinggi
52 cm² = ½ × alas × 13 cm
52 cm² = 13/2 cm × alas
alas = 52 ÷ 13/2
alas = 52 × 2/13
alas = 4 × 2
alas = 8 cm
Luas : [tex]\frac{1}{2}[/tex] × alas × tinggi
52 cm² = [tex]\frac{1}{2}[/tex] × alas × 13 cm
52 cm² = [tex]\frac{13}{2}[/tex] × alas
alas = 52 ÷ [tex]\frac{13}{2}[/tex]
alas = 52 × [tex]\frac{2}{13}[/tex]
alas = 4 × 2
alas = 8 cm
