4. Resolución
AB = CD, AC = BC
A
Trazamos la h de ACB
y de BCD
a
El ABC es isósceles,
la h = mediana C
2a E
EB = CF 60 2a
a a
AB = CD
30 = x
D
B F
2x + 1 = 2 (30) + 1= 61 6
1
6. Resolución
AE = 16 A
ABE es notable,
AB = 8
ABC es notable, 37
BC = 6 8 16
ABD es notable,
BD = 8
53 45 30
8=6+x
2=x B C D E
6 x =2
8
4x = 4(2) = 8 8