Question

What is the sum of internal angles of a triangle?

• A. One right angle
• B. Three right angle
• C. Two right angle
• D. None of these

Hint:

A key theorem in geometry is that the sum of the angles in any triangle is 180°. This is true for all types of triangles: equilateral, isosceles, scalene, acute, obtuse, and right-angled.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
This question is about the Triangle Angle Sum Theorem, which states that the sum of the measures of the interior angles of any triangle is always constant.
Step 2: Detailed Explanation
The sum of the internal angles of any triangle is always 180°.
A right angle is defined as an angle measuring 90°.
Now let's evaluate the options in terms of degrees:
(A) One right angle = 1 \( \times \) 90° = 90°.
(B) Three right angle = 3 \( \times \) 90° = 270°.
(C) Two right angle = 2 \( \times \) 90° = 180°.
Since the sum of a triangle's internal angles is 180°, this is equivalent to two right angles.