DC=√(20²+15²)=√(400+225)=√625=25 m
ducem CM_I_AD
MD=45-35=10 m
AB=CM=√(25²-10²)=√(625+100)=√525=5√21 m ≈22,91 m
P=20+15+35+5√21+45=115+5√21≈115+22,91=137,91 m
Atriunghi =20*15/2=150 m²
Atrapez=(35+45)*5√21/2=200√21≈916,52 m²
Acurte=150 +200√21=150+916,52 =1066,52 m²