Question

If triangle ABC congruent to Triangle DeF angle is equal to 40 degree angle is equal to 30 degree find the value of angle C

Answer 1

that means angle A=angle D=40°
angle B= angle E=30°
angles+angle B+angle C=180°
40°+30°angle C=180°
angle C=110°

Answer 2

Triangle ABC is congruent to Triangle DEF.

<D=30°,<E=40° & <C=?

<A=<D...........................(c.a.c.t)
SO,
<A=30°

<B=<E............................(c.a.c.t)
SO,
<B=40°

we have,
<A=30°,
<B=40°

we know that,

<A+<B+<C=180°.......(angle sum property )
30°+40°+<C=180°
70°+<C=180°
<C=180°-70°
<C=110°

Therefore,
the value of angle C is 110°.

$hope \: this \: helps$