Question

In ΔPQR , ∠Q = 90°, PR= 29cm and QR= 21cm, find PQ ?

Answer 1

Step-by-step explanation:

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Answer 2

Given

• A ΔPQR,
• ∠Q = 90°
• PR = 29 cm
• QR = 21 cm

To find

• PQ = ? cm

Solution

• In ΔPQR, ∠Q = 90°
• PQ² = PR² - QR²   (Pythagoras Theorem)
• PQ² = 29² - 21²
• PQ² = 841 - 441
• PQ² = 400
• PQ = √400
• PQ = 20 cm

☯ Length of PQ = 20 cm