Introduction to Triangles

What features do all triangles have in common?

• (a) 4 sides

• (b) 3 sides

• (c) 3 angles

• (b) and (c)

Tags

CCSS.2.G.A.1

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What is the name of this kind of triangle?

• Right
• Isosceles
• Scalene
• Equilateral

Tags

CCSS.4.G.A.2

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What is the name of this kind of triangle?

• Right
• Scalene
• Isosceles
• Equilateral

Tags

CCSS.4.G.A.2

The sum of the interior angles of a triangle is?

• 90%

• 180 degrees

• it varies

• 360 degrees

Tags

CCSS.8.G.A.5

Given the triangle sum theorem, what relationship do the acute angles of a right triangle have?

• complementary

• supplementary

• linear pair

• congruence

Tags

CCSS.8.G.A.5

Find the measure of the indicated angle. 

• 26
• 36
• 85
• 144

Tags

CCSS.8.G.A.5

Find the missing angle.

• 29° 
• 39° 
• 49° 
• 59° 

Tags

CCSS.7.G.B.5

A triangle has angle measurements of 54°, 52°, and 74°. What kind of triangle is according to the measure of its angles?

• acute triangle

• right triangle

• obtuse triangle

• none of the above

Tags

CCSS.4.G.A.2

A triangle has angle measurements of 163°, 2°, and 15°. What kind of triangle is it?

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

Tags

CCSS.4.G.A.2

Which of the following is NOT a term to classify triangles by their angles?

• acute

• equilateral

• obtuse

• right

Tags

CCSS.4.G.A.2