Question

Find the measure of x in the following figures​

Answer 1

Answer:

Since the total sum of angles around a circle is 360°, use that to form an equation.

Step-by-step explanation:

2(x) + 2(x + 18) = 360°

2x + 2x + 36 = 360°

4x + 36 = 360°

4x = 324°

x = 81°

Cross-check by adding all the numbers together, check if the answer is 360°.

Hope it helps :)

Answer 2

Here we have to find the value of x

Now, we should first know that the angle on a straight line is equal to 180°

Here, there are two angles on a straight line x and x + 18

The sum of both the angles will be 180°

so, x + x + 18 = 180

                2x = 180 - 18

                2x = 162

                   x = 162 / 2

                    x = 81

Hence, the measure of x will be 81°