Triangle Relationships

The sum of the angle measures of a triangle is 180° 
m∠A + m∠B + m∠C = 180°

• Triangle Sum Theorem

• Exterior Angle Theorem

• Third Angle Theorem

• Centroid Theorem

Tags

CCSS.8.G.A.5

Which would be the best classification for the triangle shown?

• acute isosceles

• obtuse scalene

• obtuse isosceles

• acute scalene

Tags

CCSS.4.G.A.2

Which would be the best classification for the triangle shown?

• right isosceles

• obtuse scalene

• obtuse isosceles

• right scalene

Tags

CCSS.4.G.A.2

Which would be the best classification for the triangle shown?

• acute isosceles

• equiangular scalene

• equiangular isosceles

• equiangular equilateral

Tags

CCSS.4.G.A.2

From ∠C, what side is AB?

• Adjacent

• Hypotenuse

• Opposite

Tags

CCSS.HSG.SRT.C.6

The acute angles of a right triangle are

• supplementary

• linear

• complementary

• 60°

Tags

CCSS.8.G.A.5

The measure of each angle of an equiangular triangle is 

• complementary

• supplementary

• 60°

• 45°

Tags

CCSS.8.G.A.5

The measure of an exterior angle of a triangle is equal to the sum of the measures of its remote interior angles.
m∠4 = m∠1 + m∠2

• Triangle Sum Theorem

• Exterior Angle Theorem

• Third Angles Theorem

• Congruent Triangles Theorem

Tags

CCSS.8.G.A.5

If two angles of one triangle are congruent to two angles of another triangle, then the third pair of angles are congruent.

• Triangle Sum Theorem

• Exterior Angle Theorem

• Third Angles Theorem

• Congruent Triangles Theorem

Tags

CCSS.HSG.CO.B.7

What is the correct congruence statement?  ΔDEC ≅________

• ΔAEB

• ΔEAB

• ΔBEA

• Not Congruent

Tags

CCSS.HSG.CO.B.7