Triangle Angle Sum and Triangle Exterior Angle

Front

What is the Triangle Angle Sum Theorem?

Back

The Triangle Angle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.

Tags

CCSS.8.G.A.5

Front

If one angle of a triangle is 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Tags

CCSS.4.G.A.2

Front

What are the remote interior angles of an exterior angle in a triangle?

Back

The remote interior angles are the two angles that are not adjacent to the exterior angle.

Tags

CCSS.8.G.A.5

Front

How do you find the measure of an exterior angle of a triangle?

Back

The measure of an exterior angle is equal to the sum of the measures of the two remote interior angles.

Tags

CCSS.8.G.A.5

Front

If angle A = 45 degrees and angle B = 55 degrees, what is angle C in triangle ABC?

Back

Angle C = 180 - (45 + 55) = 80 degrees.

Tags

CCSS.8.G.A.5

Front

What is the relationship between the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90 degrees.

Tags

CCSS.4.G.A.2

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle greater than 90 degrees.

Tags

CCSS.4.G.A.2

Front

What is the formula to calculate the sum of angles in a triangle?

Back

The formula is: Angle A + Angle B + Angle C = 180 degrees.

Tags

CCSS.8.G.A.5

Front

If angle D is an exterior angle, how do you express it in terms of the interior angles?

Back

Angle D = Angle A + Angle B (where A and B are the remote interior angles).

Tags

CCSS.8.G.A.5