Acute Triangle Practice
Question 1
Which of the following triangles are acute triangles?
Answer
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Step by Step Solution
Step 1
For triangle I, all the internal
angles of this triangle are <90°.
Hence, it is an acute triangle.
Step 2
As for triangle II, one of the
internal angle is 90°.
Since this angle is not <90°, it is not an acute triangle.
Step 3
Now, for triangle III, one of the
internal angle is 111° which is not <90°.
Hence, it is not an acute triangle.
Step 4
For triangle IV, all the internal
angles are <90°. Hence, it is an acute triangle.
Step 5
Clearly, only triangle I and IV are
acute triangles. Therefore, the answer
is D.
To close the steps,
acute triangle practice question page
