Triangle Interior & Exterior Angles

Front

What are the interior angles of a triangle?

Back

The interior angles of a triangle are the angles formed inside the triangle, which always sum up to 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is an exterior angle of a triangle?

Back

An exterior angle of a triangle is formed by one side of the triangle and the extension of an adjacent side. It is equal to the sum of the two remote interior angles.

Front

What are remote interior angles?

Back

Remote interior angles are the two interior angles of a triangle that are not adjacent to a given exterior angle.

Tags

CCSS.8.G.A.5

Front

How do you calculate the measure of an unknown angle in a triangle?

Back

To find an unknown angle in a triangle, subtract the sum of the known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

If two angles of a triangle are 30 degrees and 70 degrees, how do you find the third angle?

Back

Subtract the sum of the known angles (30 + 70 = 100) from 180 degrees. The third angle is 180 - 100 = 80 degrees.

Tags

CCSS.8.G.A.5

Front

What is the relationship between the exterior angle and the remote interior angles?

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

What is the sum of the angles in any triangle?

Back

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

Tags

CCSS.8.G.A.5

Front

What is the formula for finding the measure of an exterior angle?

Back

The measure of an exterior angle can be found using the formula: Exterior Angle = Remote Interior Angle 1 + Remote Interior Angle 2.

Tags

CCSS.8.G.A.5

Front

What is the definition of a triangle?

Back

A triangle is a polygon with three edges and three vertices.

Tags

CCSS.2.G.A.1

Front

What are the types of triangles based on angles?

Back

Triangles can be classified as acute (all angles less than 90 degrees), right (one angle equal to 90 degrees), or obtuse (one angle greater than 90 degrees).

Tags

CCSS.4.G.A.2