Es 73)
AB= 30* (tan 55 + tan 20) = 53,76 cm =~ 53,8 cm
BC = 30 / (sin (70)) = 31,92 cm =~ 31,9 cm
AC = 30 / sin(35) = 52,30 cm
es 73
AC = 30/sen 35° = 30/0,574 = 52,30 cm
BC = 30/sen 70° = 30/0,940 = 31,93 cm
AB = AC*cos 35°+BC*cos70° = 42,84+10,92 = 53,76 cm
es 70
disegno fuori scala
b = l = 82
tan A = 9/40
angolo A = arctan 9/40 = 12,68°
Ak = l*cos 12,68° = 82*0,9756 = 80,00 cm = BH
tan A = 9/40 = DK/AK
altezza DK = AK*9/40 = 80/40*9 = 18 cm
primetro2p = 4l+2AK = 82*4+80*2 = 488 cm
area A = 2(l+AK)*DH/2 = (82+80)*18 = 2916n cm^2
es 68
angolo C = arccos(7/25) = 73,740°
AB = 24 cm
AH = BH = 24/2 = 12 cm
AH/CH = tan (73,74/2)
CH = AH/tan (73,74/2) = 16,00 cm
BC = √12^2+16^2 = 20 cm
altezza AK = AB*CH/BC = 24*16/20 = 19,20 cm