Three Sides Form a Triangle

Which of the following measures form a triangle?

• 15, 12, 18

• 5, 6, 21

• 3, 4, 12

• 12, 13, 33

Can the following side measures form a triangle?
  3, 5, 8 

• Yes

• No

Will these three sides form a triangle?

• yes

• no

• m∠C < m∠E
• m∠E > m∠D
• m∠D < m∠C
• m∠E > m ∠C

The longest side of a triangle would be located where on a triangle?

• Across from the smallest angle

• Across from the largest angle

• Cannot tell.

• Adjacent to the smallest side.

It is the longest side of a triangle.

• Adjacent Side

• Hypotenuse

• Opposite Side

• Homogeneous

Which angle is the smallest in PQR?

• ∠P

• ∠Q

• ∠R

Will these line segments form a triangle?

• yes

• no

Which set of side lengths will form a triangle?

• 3, 6, 12

• 7, 7, 14

• 9, 9, 9

• 13, 6, 7