panjang MN α.36 cм в.39 cм c.29 cм d.24 cм

Mn^2=(24-3)^2 - 20^2 = 29cm

≡ penyelesaian :

R = 24 cm
r = 3 cm
l = 20 cm

j = .... ?
[ opsi. C ]
[tex] = \sqrt{ {l}^{2} + (R - r) {}^{2} } \\ \\ = \sqrt{ {20}^{2} + ( 24 - 3) {}^{2} } \\ \\ = \sqrt{400 + {21}^{2} } \\ \\ = \sqrt{400 + 441} \\ \\ = \sqrt{841} \\ \\ = 29cm[/tex]