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27 votes
27 votes
X =x=x, equals
^\circ


X =x=x, equals ^\circ ∘-example-1
User Msakya
by
3.0k points

2 Answers

26 votes
26 votes

Answer:
55^(\circ)

Explanation:

Angles on a straight line add to
180^(\circ).

User Abhishek Goyal
by
3.1k points
26 votes
26 votes

Given that the sum of all angles around a point is
$360^(\circ)$, we sum the known angles and subtract from
$360^(\circ)$ to find
$x$ :


$$360^(\circ)-\left(125^(\circ)+35^(\circ)+180^(\circ)\right)=360^(\circ)-340^(\circ)=20^(\circ)$$

To solve for
$x$ in the given diagram of angles, we need to apply the properties of angles formed by intersecting lines. Here's a step-by-step calculation:

1. Identify Relationships: The diagram shows angles formed by intersecting lines, so we can use the fact that the sum of angles around a point is
$360^(\circ)$.

2. Set Up Equation: If we add all the angles around the intersection point, including
$x$, we should get
$360^(\circ)$. So the equation will be:


$$125^(\circ)+x^(\circ)+35^(\circ)+\left(180^(\circ)-x^(\circ)\right)=360^(\circ)$$

Note that the angle directly opposite to
$x$ must be
$180^(\circ)-x^(\circ)$ because they form a straight line which sums up to
$180^(\circ)$.

3. Solve for
$x$ :


$$\begin{aligned}& 125^(\circ)+x^(\circ)+35^(\circ)+180^(\circ)-x^(\circ)=360^(\circ) \\& x^(\circ)-x^(\circ)+125^(\circ)+35^(\circ)+180^(\circ)=360^(\circ) \\& 125^(\circ)+35^(\circ)+180^(\circ)=360^(\circ) \\& 340^(\circ)=360^(\circ)\end{aligned}$$

This simplifies the equation, and we can now solve for
$x$ by subtracting the sum of known angles from
$360^(\circ)$.

4. Calculation: Let's do the calculation.

The value of
$x$ is
$20^(\circ)$.

User Jared Thirsk
by
2.6k points