diketahui trapesium sama kaki ABCD dengan AD = BC,AB = 15 cm,dan sudut BAD = 45 derajat. hitunglah:a.besar sudut ADC b.tinggi trapesium c.luas trapesium!

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bad=abc=45......adc=bcd
bad+abc=90.......adc+bcd=360-90=270
adc=270/2=135
b)tan 45=depan/samping=1/1
 t=........1/1=t/5
t=5
c)L=1/2*(15+5)*5=50