Tolong jawab plisee!!! No 7,8,9,10

no.7
a. < BAC = 50°
b. < ABC = 50°
BAC=ABC kan sama kaki, segitiga kan 180° jadi 180 - 80 = 100°. 100÷2 = 50° karna sama kaki sama derajatnya.
c. < BCD = 10°
karna < ACD siku2 =90° jadi 90-80 = 10°
d. < DCE = 90° karna siku2


no.8
a. < EDB = 78° karna bersebrangan jadi sma dengan < ACE
b. < DBE = 180-132 = 48°
c. < CAE = 48° = < DBE

no.9
< BAC = 75° = < CED
< ACB = 180-130 = 50°
< EDF = 180- 55 = 125°