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Valentin [98]
3 years ago
12

SOMEONE PLEASE HELP!!

Mathematics
2 answers:
lesya692 [45]3 years ago
8 0
First you need the size of an angle QPR = B = 180° - 123°
Lenght of QP = 10cm
QR = x
QP = r
x² = r² + r² - 2r² × cosB
Rina8888 [55]3 years ago
8 0

Answer:19.9

Step-by-step explanation:

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