Question

A4) Find meanings of the given words/phrases from the passage 1) Keep aside ​

Answer 1

⟶

ar(PQR)

ar(ABC)

=

(QR)

2

(BC)

2

\longrightarrow{\rm{\dfrac{100}{121} = \dfrac{(5)^{2} }{(QR)^{2}}}}⟶

121

100

=

(QR)

2

(5)

2

\longrightarrow{\rm{\dfrac{100}{121} = \dfrac{25}{(QR)^{2}}}}⟶

121

100

=

(QR)

2

25

\longrightarrow{\rm{100 \times {QR}^{2} = 121 \times 25}}⟶100×QR

2

=121×25

\longrightarrow{\rm{100 \times {QR}^{2} = 3025}}⟶100×QR

2

=3025

\longrightarrow{\rm{100 \times {QR}^{2} = 3025}}⟶100×QR

2

=3025

\longrightarrow{\rm{ {QR}^{2} =30.25}}⟶QR

2

=30.25

\longrightarrow{\rm{ {QR} = \sqrt{30.25}}}⟶QR=

30.25

\longrightarrow{\rm{ {QR} = 5.5}}⟶QR=5.5

Therefore, measure of QR is 5.5 cm.