5.1 Angles of Triangles & Ch 3 Corrections

Front

Classify the triangle by its angles: What type of triangle has all angles less than 90°?

Back

Acute triangle

Front

The exterior angle of a triangle is equal to the sum of which angles?

Back

The two opposite interior angles.

Front

What does the Triangle Sum Theorem state about the sum of angles in a triangle?

Back

The sum of all angles in a triangle is 180°.

Front

What is the name of a triangle with all sides of equal length?

Back

Equilateral triangle.

Front

Set up an equation to find x: 42 + 8x = ?

Back

2 + 12x.

Front

What type of triangle has one angle greater than 90°?

Back

Obtuse triangle.

Front

What type of triangle has one angle equal to 90°?

Back

Right triangle.

Front

What is the name of a triangle with two sides of equal length?

Back

Isosceles triangle.

Front

If a triangle has angles measuring 60°, 60°, and 60°, what type of triangle is it?

Back

Equiangular triangle.

Front

What is the relationship between the angles of a triangle and a straight line?

Back

The angles on a straight line sum to 180°.