Question

What is the value of y?

Answer 1

Answer:

54

Step-by-step explanation:

180-72=108

108÷2=54

Answer 2

Answer:

A. 54°

Step-by-step explanation:

The sum of a standard (no curved lines) triangle's internal angles will always be 180°. You know the following:

1. The internal angles sum to 180°

2. One of the angles measures 72°

3. The remaining angles have the same unknown value, y

From this, you can write the following equation:

$180 = 72 + 2y$

Then, to solve, first isolate y:

$180 - 72 = 2y$

$108 = 2y$

Then, simply divide by 2 to solve for y:

$\frac{108}{2} = \frac{2y}{2}$

$54 = y$

So, based on the information given, y=54°.