Find the value of x. The diagram is not to scale.

72

Step-by-step explanation:

If we look at the smaller triangle, it has side lengths of 31, 36 and 43. Since those measurements are given again on part of the bigger triangle, we can conclude that the smaller triangle has been dilated by a scale factor of 2 to get the bigger triangle. Using this, we can multiply 36 by 2 to get our answer of 72.

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

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