Angle Measures and Side Lengths

Isosceles triangles ...

• have three different side lengths

• have two side lengths that are congruent

• have two angles that are congruent

• always have a 90 degree angle

How do you classify this triangle?

• acute

• obtuse

• right

• scalene

What is the measure of angle a?

• 180

• 60

• 30

• 50

What is the measure of the missing angle?

• 80

• 60

• 50

• 70

The angles inside an equilateral triangle are all ...

• 20 degrees

• 50 degrees

• 60 degrees

• 45 degrees

The sum of the interior angles in a triangle is ...

• 360 degrees

• 180 degrees

• 90 degrees

• 540 degrees

Scalene triangles ...

• have three different angle mesures

• have two side lengths that are congruent

• have three different side lengths

• always have one right angle

A triangle has two angles that are 65 degrees and 50 degrees. What must the third angle be?

• 65

• 75

• 25

• 60

Which shows the side lengths of the triangle in order from greatest length to least length?

• AB, BC, AC

• AC, BC, AB

• BC, AC, AB

• AC, AB, BC

Which of the following shows the relationship among the side lengths of the triangle?

• p < l < c

• l < c < p

• c < p < l

• p < c < l