39.If in Δ ABC , D is the midpoint of sideBC , angle ADB=45^° and angle ACD=30^° , then angle BAD and angle ABC are respectively equal to

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Q. In triangle

A B C

B C

is produced to

D

A

D

are joined. If

∠ B A C = 60^{o}

∠ A B C = 45^{o}

. Find

∠ A C D

$I n a Δ A B C, s i d e B C i s p r o d u c e d t o D . I f ∠ A B C = 50^{\circ} a n d ∠ A C D = 110^{\circ} t h e n ∠ A = ? (a) 160^{\circ} (b) 60^{\circ} (c) 80^{\circ} (d) 30^{\circ}$

Q. The sides BC, CA and AB of

Δ A B C

are produced in order to form exterior angles

∠ A C D

∠ B A F

and

∠ C B E

respectively, then

∠ B A F + ∠ A C D + ∠ C B E

In the isosceles triangle ABC, ∠A and ∠B are equal. ∠ACD is an exterior angle of ∆ABC. The measures of ∠ACB and ∠ACD are
(3x

-

17)^° and (8x + 10)^°respectively. Find the measures of ∠ACB and ∠ACD. Also find the measures of ∠A and ∠B.

Q. In Figure,, the sides BC, CA and BA of a

Δ A B C

have been produced to D, E and F respectively. If

∠ A C D = 105^{\circ} a n d ∠ E A F = 45^{\circ};

find all the angles of the

Δ A B C . .

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