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24-05-2018
Mathematics

contestada

Given: m∠P = 51° and PR = 17 cm. What is QR?
Question 5 options:

21 cm

4 cm

10.7 cm

13.2 cm

Given mP 51 and PR 17 cm What is QR Question 5 options 21 cm 4 cm 107 cm 132 cm class=

Respuesta :

calculista calculista

02-06-2018

we know that
in the right triangle PQR
sin 51°= opposite side angle 51°/hypotenuse

opposite side angle 51°=QR
hypotenuse=17 cm
so
sin 51°=QR/17------> QR=17*sin 51°-----> QR=13.21 cm-----> QR=13.2 cm

the answer is
QR=13.2 cm

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