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What is the length of QR rounded to nearest whole number?

A. 11 cm
B. 2 cm
C. 5 cm
D. 14 cm

What is the length of QR rounded to nearest whole number? A. 11 cm B. 2 cm C. 5 cm-example-1

2 Answers

3 votes
d. 14 cm

tan(70)=QR/5

cross multiply: QR=5 tan(70)
User Sthede
by
7.6k points
3 votes

Here we are given

angle S = 70°

RS= 5cm

Now we know that ,


tanx=(Perpendicular)/(Base)

Here angle x is 70 degrees and Base RS is 5 cm.

Also Perpendicular is QR, which we have to solve for,

Plugging these values in the formula above,


tan(70)=(QR)/(5)


2.74747742=(QR)/(5)

QR=13.735cm

QR=14cm(approximately)

Answer: QR= 14 cm (option D)


User Mike Bevz
by
8.4k points

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