Triangles Sum Theorem & Exterior Angle Theorem

Front

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

Back

180°

Front

Which of the following terms best describes Angle d?

Back

Exterior angle

Front

A student is trying to construct triangles using four different sets of angles. Which set will form a triangle? 1) 45°, 65°, 70° 2) 150°, 110°, 100° 3) 50°, 50°, 50° 4) 90°, 90°, 90°

Back

45°, 65°, 70°

Front

What type of triangle is shown if it has one angle greater than 90°?

Back

Obtuse triangle

Front

What type of triangle is shown if it has one angle equal to 90°?

Back

Right triangle

Front

What type of triangle is shown if all angles are less than 90°?

Back

Acute triangle

Front

If one angle of a triangle is 60° and another is 70°, what is the measure of the third angle?

Back

50°

Front

In a triangle, if two angles are equal, what type of triangle is it?

Back

Isosceles triangle

Front

What is the measure of each angle in an equilateral triangle?

Back

60°

Front

If the exterior angle of a triangle is 120°, what is the sum of the two remote interior angles?

Back

120°