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Step-by-step explanation:
Given,
i.) angle PQR =90 degree, and angle PRQ =30 degree.
We know that,
Sum of all sides of a triangle is equal to 180 degree
Therefore, 90 degree + 30 degree + angle QPR= 180 degree
=120 degree + QPR =180 degree
= Angle QPR =180-120
=60 degree.
ii.) pq=6 cm then qr =8 cm
now, base²+hieght²=hypotenuse ²
=6²+8²=pr
36+64=pr
100=pr²
pr=√100
pr=10 cm.
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