2021 Semester 1 Unit 4

Front

What are the properties of an equilateral triangle?

Back

All sides are of equal length and all angles measure 60 degrees.

Front

What is the measure of each angle in an equilateral triangle?

Back

60 degrees.

Front

If one angle of a triangle is 80 degrees, what is the sum of the other two angles?

Back

The sum of the angles in a triangle is 180 degrees, so the sum of the other two angles is 100 degrees.

Front

How do you find the value of x in a triangle?

Back

Use the properties of triangles, such as the sum of angles or the Pythagorean theorem, depending on the triangle type.

Front

What is the formula for the sum of interior angles in a triangle?

Back

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

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is the difference between acute, obtuse, and right angles?

Back

Acute angles are less than 90 degrees, obtuse angles are greater than 90 degrees but less than 180 degrees, and right angles are exactly 90 degrees.

Front

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

Back

The exterior angle is equal to the sum of the two opposite interior angles.

Front

What is the relationship between the angles in a triangle?

Back

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

Front

What is the definition of a triangle?

Back

A polygon with three edges and three vertices.