Categorizing Triangles and Their Angles

What is always true about the largest angle in a triangle?

• It is always 90 degrees.

• It is equal to the smallest angle.

• It is directly across from the largest side.

• It is adjacent to the smallest side.

What is the sum of all interior angles in a triangle?

• 270 degrees

• 360 degrees

• 180 degrees

• 90 degrees

What do the interior and exterior angles of a triangle add up to when they are adjacent?

• 90 degrees

• 180 degrees

• 270 degrees

• 360 degrees

If two interior angles of a triangle are 30° and 48°, what is the measure of the third interior angle?

• 60°

• 102°

• 90°

• 78°

Given an exterior angle of 124° and an interior angle of 70°, what is the measure of the other non-adjacent interior angle?

• 54°

• 124°

• 56°

• 70°

What is a characteristic of a scalene triangle?

• No sides are equal.

• All sides are equal.

• Two sides are equal.

• All angles are equal.

What is true about an equilateral triangle?

• It has two equal sides.

• It has one obtuse angle.

• All sides and angles are equal.

• It has one right angle.

What is true about the angles in an isosceles triangle?

• All angles are different.

• All angles are equal.

• Two angles are equal.

• It has one right angle.

What type of triangle has all angles less than 90°?

• Acute triangle

• Obtuse triangle

• Scalene triangle

• Right triangle

What type of triangle has one angle that is exactly 90°?

• Equilateral triangle

• Right triangle

• Obtuse triangle

• Acute triangle