Right Triangle Practice

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Question 1

Which of the following triangles are right triangles?

identify all the right triangles

Answer

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Select and check your answer...

A. I & II
B. II & III
C. III & IV
D. I & IV

Step by Step Solution

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    Step 1

    For triangle I, there is no internal angle that is 90°. Hence, this is not a right triangle.

    Triangle I is not a right triangle
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    Step 2

    As for triangle II, the angle at vertex A is 90°. Hence, this is a right triangle.

    Triangle II is a right triangle
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    Step 3

    Now, as for triangle III, the 'square' below represents the angle 90°. Hence, this triangle is a right triangle.

    Triangle III is a right triangle
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    Step 4

    For triangle IV, there is no angle that is 90°. Hence, this is not a right triangle.

    Triangle IV is a not a right triangle
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    Step 5

    Clearly, only triangle II and III are right triangles. Therefore, the answer is B.

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