Kunci Jawaban Matematika Kelas 4 SD MI Halaman 125 126, Tentukan Keliling Segitiga

a. K = 67 cm, b = c

K = a + b + c

= a + b + b

= a + (2 x b) = K

13 cm + (2 x b) = 67 cm

2 x b = 67 cm – 13 cm

2 x b = 54 cm

b = 54 cm : 2 = 27 cm

b. K = 24 cm, b = 8 cm, a = 6 cm, c = 10 cm

a² + b² = c²