Question

11. Consider the adjoining figure. Find the value of QR.​

Answer 1

Answer:

Hello...

QR = 28 cm

Step-by-step explanation:

Triangle PQS and PRS both are right angled triangles.

We can first find length of QS and then length of SR.

In triangle PQS

QS² + PS² = PQ² ( Pythagoras Theorem )

QS² + 15² = 17²

QS² + 225 = 289

QS² = 289 - 225

QS² = 64

QS = 8 cm

In triangle PRS

SR² + PS² = PR²

SR² + 15² = 25²

SR² + 225 = 625

SR² = 625 - 225

SR² = 400

SR = 20 cm

Length of QR = QS + SR

= 8 + 20

= 28 cm.

Answer 2

Answer:

=17cm+15cm

=32

=180-32

=148cm

=148+32

=180

so, Q=32

=25cm+15cm

=40

=180-40

=140cm

=140+40

=180

so, R=40

Step-by-step explanation:

we add 180 to check the answer.

because the sum of every triangle is 180.