EM-1345

Pythagoras’ theorem

E Math · Secondary 3 · Hard · Pythagoras’ theorem

In

\triangle PQR

,

PQ=12\text{ cm}

and

PR=5\text{ cm}

. The angle between them,

\angle QPR

, is

90^\circ

. Find the length of

QR

.

$10.9\text{ cm}$
$13\text{ cm}$
$7\text{ cm}$
$8.6\text{ cm}$

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