Question

choose the alternative
1) In APQR, ZQ = 90° , PQ=3
and QR = 4, QS is median find
I(QS).
*
o 7.5
o 1.5
O
6.5
O
2.5​

Answer 1

Answer:

In △PQR,∠PQR=90

∘

BY Pythagoras theorem,

PR

2

=PQ

2

+QR

2

⇒(5)

2

=PQ

2

+(4)

2

⇒(5)

2

−(4)

2

=PQ

2

⇒PQ

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2

=25−16

⇒PQ

2

=9

⇒PQ=

9

⇒PQ=3

tanR=

QR

PQ

=

4

3

.