Math

QuestionFind the length xx of TP\overline{TP} if pentagons JKLMNJKLMN and PQRSTPQRST are similar, with QR=3.6QR=3.6, QP=0.9QP=0.9, RS=0.9RS=0.9, and ST=1.8ST=1.8.

Studdy Solution

STEP 1

Assumptions1. The pentagons JKLMNJ K L M N and QR Q R are similar. . The sides of similar polygons are proportional.
3. The given lengths are QR=3.6QR=3.6, QP=0.9QP=0.9, RS=0.9RS=0.9, and =1.8=1.8.
4. We are asked to find the length xx of T\overline{T}.

STEP 2

Since the pentagons are similar, the ratio of corresponding sides is constant. We can set up a proportion to find the length xx of T\overline{T}.
Let's denote the corresponding sides of pentagon JKLMNJ K L M N as aa, bb, cc, dd, and ee in the same order as QR Q R.
We know that aQP=bQR=cRS=d=eTPaQP = bQR = cRS = d = eTP.

STEP 3

We can choose any two ratios to set up our proportion. Since we know the lengths of QRQR, QPQP, RSRS, and $$, we can use these to set up our proportion. Let's use $aQP = d$.
aQP=d\frac{a}{QP} = \frac{d}{}

STEP 4

Substitute the given lengths into the proportion.
a0.9=d1.8\frac{a}{0.9} = \frac{d}{1.8}

STEP 5

We can simplify this equation by multiplying both sides by0.9.
a=d×0.91.8a = \frac{d \times0.9}{1.8}

STEP 6

implify the right side of the equation.
a=d2a = \frac{d}{2}

STEP 7

Since aa and dd are corresponding sides of the same pentagon, they are equal. So, we can say that d=2ad =2a.

STEP 8

Now, we can use another ratio to find xx, the length of T\overline{T}. Let's use aQP=eTPaQP = eTP.
aQP=eTP\frac{a}{QP} = \frac{e}{TP}

STEP 9

Substitute a=2da =2d and TP=xTP = x into the equation.
2dQP=ex\frac{2d}{QP} = \frac{e}{x}

STEP 10

Substitute the given length QP=0.9QP =0.9 into the equation.
2d0.9=ex\frac{2d}{0.9} = \frac{e}{x}

STEP 11

We know that d==.8d = =.8, substitute this into the equation.
×.80.9=ex\frac{ \times.8}{0.9} = \frac{e}{x}

STEP 12

implify the left side of the equation.
4=ex4 = \frac{e}{x}

STEP 13

olve for xx.
x=ex = \frac{e}{}

STEP 14

Since ee and dd are corresponding sides of the same pentagon, they are equal. So, we can say that e=d=.8e = d =.8.

STEP 15

Substitute e=.8e =.8 into the equation.
x=.84x = \frac{.8}{4}

STEP 16

Calculate the value of xx.
x=.84=0.45x = \frac{.8}{4} =0.45The length of T\overline{T} is0.45.

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