Triangles - Inequality Theorem & Angle Sum

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

• 360 degrees

• 180 degrees

• 90 degrees

• 540 degrees

Tags

CCSS.8.G.A.5

If two angles in a triangle are  $45\degree$  and  $\ 75\degree$ , what is the measure of the third angle?

•  $75\degree$  

•  $90\degree$  

•  $60\degree$  

•  $70\degree$  

Tags

CCSS.8.G.A.5

*Select all that apply*

Equilateral triangles ...

• have three angles that are the same measure

• have three side lengths that are the same measure

• have only acute angles

• have three angles that are each 60 degrees

Tags

CCSS.4.G.A.2

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

Tags

CCSS.2.G.A.1

The word "congruent" means ...

• obtuse

• different

• acute

• equal

Tags

CCSS.8.G.A.2

Scalene triangles ...

• have three different angle mesures

• have two side lengths that are congruent

• have three different side lengths

• always have one right angle

Tags

CCSS.4.G.A.2

 $This\ symbol\ \cong means\ ...\$  

• acute

• congruent

• obtuse

• right

Tags

CCSS.8.G.A.2

Acute triangles have ...

• have one obtuse angle

• three angles that are acute

• one right angle

• have three angles that are less than 90 degrees

Tags

CCSS.4.G.A.2

A right triangle has ...

• one right angle

• three acute angles

• two right angles

• three obtuse angles

Tags

CCSS.4.G.A.2

How do you classify this triangle?

• acute

• obtuse

• right

• scalene

Tags

CCSS.4.G.A.2