RanshiVM
Masih bentuk akar, soalnya bingung gimana menyederhanakannya ._.
Btw, s di situ artinya adalah setengah keliling segitiga.
Takamori37
Dengan: a = 7 cm b = 8 cm K = 25 cm Maka, c = 10 cm
Didapat: s = 1/2 (a+b+c) s = 1/2 (7+8+10) s = 1/2 x 25 s = 25/2
Maka, Luasnya adalah: = √s(s-a)(s-b)(s-c) = √25/2 (25/2-7) (25/2-8) (25/2-10) = √25/2 (11/2)(9/2)(5/2) = √1/16 x 25 x 9 x 11 x 5 = 1/4 x 5 x 3 x √55 = 15/4 √55 cm²
b = 8 cm
c = 25 cm - 8 cm - 7 cm
= 10 cm
s = 25 cm : 2
= 12,5 cm
L =
=
=
= cm²
a = 7 cm
b = 8 cm
K = 25 cm
Maka,
c = 10 cm
Didapat:
s = 1/2 (a+b+c)
s = 1/2 (7+8+10)
s = 1/2 x 25
s = 25/2
Maka,
Luasnya adalah:
= √s(s-a)(s-b)(s-c)
= √25/2 (25/2-7) (25/2-8) (25/2-10)
= √25/2 (11/2)(9/2)(5/2)
= √1/16 x 25 x 9 x 11 x 5
= 1/4 x 5 x 3 x √55
= 15/4 √55 cm²