Question

First picture answers-(1) 3 4 7 12

Answer 1

The exterior angle is ∠3 and ∠BAC is 78°

Step-by-step explanation:

An exterior angle is one formed by one side of a triangle and extension of an adjacent side of the triangle.The sum of two non-adjacent interior angles will equal the measure of the exterior angle of the triangle.

In finding the value of ∠BAC first find ∠BCA (180°-113°=67°) ⇒sum of angles formed in a straight line add up to 180°

∠BAC= 180°-(∠ABC +∠BCA)⇒sum of angles in a triangle

∠BAC=180°-(35°+67°)

∠BAC=180°-102°=78°

Learn More

Angles : brainly.com/question/11850487

Keyword : Angles

#LearnwithBrainly