A triangle with one obtuse angle and two acute angles is called:

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Right angled triangle

Acute angled triangle

Obtuse angled triangle

None

answer is C.

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Detailed Solution

Concept- To begin with, we must comprehend the definition of each and every angled triangle, i.e., an acute angle triangle is one with an angle smaller than 90. Triangles with obtuse angles have angles greater than 90. Triangle with a right angle has an exact 90 degree angle. We will next determine what the appropriate response is in this case.
Here, we'll start by comprehending each and every angled triangle that is listed as an alternative.
An acute angled triangle is one in which all of the angles are less than 90 degrees.

.
Here is an illustration:
Question Image

Obtuse angled triangle- It refers to a created angle that is greater than 90 degrees, which is indicated by

.
Both angles are sharp for the most part. Below is an example.
Question Image

Right-angled triangle: This refers to a triangle with one angle that is exactly 90 degrees from the line marked by

. Both of the angles are sharp.
Question Image

Now, we must determine which triangle has a single angle.

and the final two angles

.
Thus, it is clear that the acute angled triangle contains all of the angles.

. So it is incorrect.
Similar to how one angle creates an acute angle triangle.

and remaining with

.
As a result, an obtuse angled triangle is a triangle with one obtuse angle and two acute angles.
Hence, the correct answer is option 3.
Syllabus: CBSE

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