Question

In a triangle, the measure of angle A is 3times the measure of angle B, and the measure of angle C is 5 degrees more than the measure of angle B. What is the measure of angle A?
answers:
60 degrees
75degrees
90 degrees
105 degrees...
how is this problem done and what is the answer? Thank you

Answer 1

i think this question is missing out a key information. Does A and B and C reside somewhere, maybe in a triangle or something?

Answer 2

yes, a triangle.

Answer 3

I'm going to go out on a limb here and assume we're working with a triangle.

In all triangles, the angles add up to 180.

That means we have a few equations we can work out:\[A+B+C=180\] as well as \[C=B+5\] and \[A = 3B\]


Hope that helps!

Answer 4

ah, sorta, still have to plug numbers in i dont know where though

Answer 5

A triangle is equal to 180, 180 minus angle c (5) is 175, and angle b is 3x so divide 175 by 3, you get 58.3, so i'm guessing it's 60 degrees cause you can end up rounding the 58.3 to that by turning it into a fraction. I'm pretty sure that's how you do this I just finished this class.

Answer 6

the answer says 105.

Answer 7

The I have no idea how I got an A in that class, lol sorry.

Answer 8

good for you, it's okay.

Answer 9

set B=x
A 3 times the size of be =3x
c is 5 more than b= x+5
3x+x +(x+5)=180 just solve for x and substitute into 3x, x, and x+5

Answer 10

okay, ILl try