Answer:
Step-by-step explanation:
Saturday
Answer:
Solution given:
<ABC and <QRS are supplementary angles.
<ABC = 91°
we have
<ABC +<QRS=180°[supplementary]
<QRS=180°-91°=89°
m<QRS=89°
In isosceles triangle ∆ABC,
AC is the base and ADis the angle bisector of ∠A.
If ∠ADB = 110 then <ADC=70 (Linear pair of angles )
Therefore <DAC= 1/2(<DBA) (AD is the bisector of <A.)
<DAC + <DBA =180-70 =110
1/2(<DBA) + <DBA=110
<DBA=220/3 and <DAB=220/6
if <DAB=220/6 then <BAC=220/3
<ABC = 180 -(2x <BAC)= 100/3
Therefore the isosceles , ∆ABC,
<ABC=100/3, <BAC =<BCA=220/3