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ss7ja [257]
3 years ago
8

What is the value of x? enter your answer in the box. units triangle a p r with line segment c d parallel to segment a p with c

between a and r and d between p and r. a c equals 10. c r equals x. p d equals 15. d r equals 42?

Mathematics
2 answers:
Natasha2012 [34]3 years ago
7 0

Answer:

The answer is 28

Step-by-step explanation:

15 divided by 10 is 1.5,

42 divided by 1.5 equals 28,

hence the answer is 28.

galben [10]3 years ago
5 0

Answer: x = 28 unit

Step-by-step explanation:

Here, In triangle APR,

CD ║ AP,

Such that, C ∈ AR and D ∈ PR,

Also, AC = 10 unit, CR = x unit, PD = 15 unit and DR = 42 unit,

Since, CD ║ AP,

Thus, by the alternative interior angle theorem,

\angle APR\cong \angle CDR

\angle PAR\cong \angle DCR

Thus, By AA similarity postulate,

\triangle APR\sim \triangle CDR

Since, the corresponding sides of the similar triangle are in same proportion,

\implies \frac{AR}{CR}=\frac{PR}{DR}

\implies \frac{AC+CR}{CR}=\frac{PD+DR}{DR}

\implies \frac{10+x}{x}=\frac{15+42}{42}

\implies 420 + 42 x = 15 x + 42 x

\implies 420 = 57 x - 42 x

\implies 420 = 15 x\implies 28 = x

Hence, the value of x = 28.

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