What is the angle between two given sides of a triangle called? a. included angle b. inside angle c. inscribed angle d. outside angle

The angle between two given sides of a triangle is called an included angle.

A. included angle

step-by-step explanation:

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: