Question

Sebuah segitiga sama sisi memiliki panjang sisi √40cm tentukan:
A.keliling
B. Tinggi
C. Luas

Answer 1

Verified answer

A.
K = 3s
= 3√40 cm

B.
t = √{s² - (1/2 × s)²}
= √{(√40 cm)² - (1/2 × √40 cm)²}
= √{40 cm² - (1/4 × 40 cm²)}
= √(40 cm² - 10 cm²)
= √(30 cm²)
= √30 cm

C.
L = 1/2 × a × t
= 1/2 × √40 cm × √30 cm
= 1/2 × √70 cm²