Understanding Angles in Triangles

Which types of triangles does the angle rule apply to?

• Only scalene triangles

• All types of triangles

• Only isosceles and equilateral triangles

• Only right-angled triangles

What is the sum of the interior angles in any triangle?

• 270 degrees

• 180 degrees

• 360 degrees

• 90 degrees

How can the angle rule be used to find a missing angle in a triangle?

• Adding all angles and dividing by three

• Subtracting known angles from 360°

• Subtracting known angles from 180°

• Multiplying known angles by two

What is the correct statement about the angles in a triangle?

• They add up to exactly 180°

• They add up to exactly 90°

• They add up to more than 180°

• They add up to less than 180°

Which statement is true for the sum of angles in any triangle?

• It varies depending on the triangle type

• It is always less than 180°

• It is always more than 180°

• It is always exactly 180°

If two angles in a triangle are 70° and 60°, what is the third angle?

• 50 degrees

• 40 degrees

• 60 degrees

• 30 degrees

If a triangle has angles of 70° and 60°, what operation helps find the third angle?

• Multiplication of 70 and 60

• Subtraction from 180

• Subtraction from 100

• Addition of 70 and 60

In a right-angled triangle, if one angle is 90° and another is 50°, what is the size of the third angle?

• 50 degrees

• 40 degrees

• 30 degrees

• 60 degrees

What is the third angle in a right-angled triangle with another angle of 50°?

• 90 degrees

• 80 degrees

• 50 degrees

• 40 degrees