Triangles

A triangle has angle measurements of 26°, 59°, and 95°. What kind of triangle is it?

• acute triangle
• right triangle
• obtuse triangle
• none of the above

A triangle has side lengths of 19 centimetres, 19 centimetres, and 20 centimetres. What type of triangle is this?

• equilateral triangle

• isosceles triangle

• scalene triangle

• none of the above

When classifying a triangle by its sides, what type of triangle has exactly two equal sides?

• equilateral triangle

• isosceles triangle

• scalene triangle

• none of the above

In a triangle, what is the sum of the interior angles?

• 100%

• 180 degrees

• it varies

• 360 degrees

Find the measure of the indicated angle. 

• 95
• 85
• 35
• 45

Find the measure of the indicated angle. 

• 26
• 36
• 85
• 144

Find the missing angle.

• 29° 
• 39° 
• 49° 
• 59° 

Identify the type of triangle.

• Acute

• Right

• Obtuse

• Yes, they

  equal 180

  degrees 

• No, they

  do not equal

  180 degrees 

• Yes, they equal 150

  degrees 

• Yes of course..what else would have 3 angles and not be a triangle

What is the triangle inequality theorem?

( what 3 sides make a triangle)

• The sum of two sides must be greater than the third side.

  short + short > long

• the difference of two sides must be greater than the third side.

  short - short > long

• I can add up any three sides and they will always make a triangle.