Answer:
∠5 = 60°
∠6 = 30°
∠7 = 120°
Step-by-step explanation:
Since the polygon is regular, you know that the central angle (7) is 1/3 of the circle, or 120°. The angle 5 is half that measure, so is 60°, and the angle 6 is the complement of angle 5, so is 30°. (Angle 6 is also half the inscribed angle at each vertex, said inscribed angle being 120°/2 = 60°.)
∠5 = 60°
∠6 = 30°
∠7 = 120°
Hi there!
First work out the parenthesis.
Now collect the terms.
Next up we can answer our questions.
The coefficient of the a^2 term is...
B) -2
The coefficient of the ab term is...
B) 4
The coefficient of the b term is...
A) -2
The answer is 1,922,167,978,750,000