a. 7x + 2x =90°
9x=90°
x=90/9
x=10
b. PQR=2x
=2×10=20
c. RQS=7x
=7×10=70
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Verified answer
PENYELESAIAN
a. 7x + 2x =90°
9x=90°
x=90/9
x=10
b. PQR=2x
=2×10=20
c. RQS=7x
=7×10=70
[tex]by \: star97[/tex]