Question

plz ans the que. in detail fast plz​

Answer 1

Answer:

80°

If it helps mark me as brainliest.

Step-by-step explanation:

In ∆ABC,

Angle BAC

= 180°- AngleABC- AngleACB. (Angle Sum Property)

=180°-45°-35°

=100°

Therefore,

Angle DAC= 180°- Angle BAC. (Linear pair)

=> a°= 180°- 100°

=> a= 80

You can also use the exterior angle property to calculate the angle in just one equation.

Answer 2

Answer:

In the diagram we see that ABC is a triangle

As we know that the sum of the all angles of a triangle is 180°

In the given diagram

angleA +angleB + angleC =180°

= angleA = 180°- (45°+35°)

= angle A = 100°

Now, angle BAC + a° = 180°

= a°= 180° - angle BAC

= 180°- 100°

= 80°

alternate method :

An exterior angle of a triangle is equal to the sum of the two opposite interior angles.

so a° = 45° + 35° = 80°

Hope it help you..