Angles and Triangles Relationships

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 

• 45°

• 90°

• 180°

• 360°

Find the measure of x in degrees.

• 21

• 132

• 153

• 27

Find the measure of x in degrees using the Exterior Angle Theorem.

• 40

• 54

• 60

• 42

Which of the following angles are remote interior angles to angle d?

• Angle a and Angle b

• Angle b and Angle c

• Angle a and Angle c

• Angle a and Angle b and Angle c

Where would the largest angle of a triangle be located?

• Across from the longest side.

• Across from the shortest side

• I need more information to get an answer.

Which is NOT true about ∠BAD?

• m∠BAD > 90°

• ∠BAD is obtuse

• ∠BAD is an exterior ∠ of ∆ABC

• ∠BAD is acute

Quinn made a statement about the triangle shown. Determine whether his statement is true or false.

• True

• False

If one angle of a triangle is equal to the sum of other two angles, then the triangle is ____

• an isosceles triangle

• an obtuse angled triangle

• an equilateral triangle

• a right angled triangle

Which is NOT true about ∠BAD?

• m∠BAD > 90°

• ∠BAD is obtuse

• ∠BAD is an exterior ∠ of ∆ABC

• ∠BAD is acute

An obtuse triangle has _________________ obtuse angle(s).

• 1

• 2

• 3

• It varies.