matematika dengan memakai cara

1. segitiga sama kaki
2. tiga
3. tidak tau
4. 11 km + 9 km =>> 20 km
5. 9 - 7 =>> 2 cm

1. siku siku
2.20,21,29
3.
[tex]{bc}^{2} = {16 }^{2} - {12}^{2} \\ {bc}^{2} = 256 - 144 \\ {bc}^{2} = 122 \\ bc = \sqrt{122} \\ bc = 11[/tex]
[tex] {bd}^{2} = {25}^{2} - {11}^{2} \\ = 625 - 121 \\ = 504 \\ bd = \sqrt{504} \\ = 22[/tex]
4.