What is the value of x given that pq bc

Question:

What is the value of x, given PQ || BC? Triangle: A, B, C with bisector PQ.

AP = 8, PB = x, AQ = 12, QC = 18

The Similar Triangle:

If two triangles are said to be similar when their angles are congruent but in different sizes. The basic property of a similar triangle is the length of the sides of the corresponding triangles are proportional to each other.

Answer and Explanation: 1

Given that {eq}PQ || BC {/eq} and triangle: A, B, C with bisector PQ.

The points are:

{eq}AP = 8, \\ PB = x, \\ AQ = 12, \\ QC = 18 {/eq}

From the given information, we obtain that the triangles {eq}\text{ABC and APC} {/eq} are similar.

By similar triangle:

{eq}\frac{AP}{PB}=\frac{AQ}{QC} {/eq}

Let us apply the given values in the above property to find the value of {eq}x {/eq}:

{eq}\begin{align*} \frac{AP}{PB} &=\frac{AQ}{QC} \\[0.3cm] \frac{8}{x} &=\frac{12}{18} \\[0.3cm] 8 \cdot \:18 &=x \cdot \:12 & [\text{By cross Multiplication} ] \\[0.3cm] x\cdot \:12 &=144 \\[0.3cm] x&=12. \end{align*} {/eq}

Hence, {eq}\color{blue}{PB=12.} {/eq}


Learn more about this topic:

What is the value of x given that pq bc

Similar Triangles: Definition, Formula & Properties

from

Chapter 8 / Lesson 28

Learn what similar triangles are. Study the definition of similar triangles, identify properties of similar triangles, and solve similar triangles equations.


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