Question detail

reasoning check: a right-angled triangle has shorter sides 3 cm and 4 cm. Find the hypotenuse.

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Mensuration and calculation

Question

A. 5
B. 9
C. 1
D. 10

Answer

The correct answer is 5.

Explanation

Trace the calculation before choosing. The verified method for Sine and cosine rules gives 5; no later explanation is allowed to change that value. This Pythagoras example is tied to a right-angled triangle and the hypotenuse.

Common mistake

Sine and cosine rules common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Know and apply the sine rule and cosine rule to find unknown lengths and angles..

Show the method first, then give the final answer in the required form. Apply this directly to Sine and cosine rules.

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