ANGLES OF TRIANGLES AND POLYGONS

Front

What is the sum of the interior angles of a triangle?

Back

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

Front

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

Back

Each angle in an equilateral triangle measures 60°.

Front

Define a scalene triangle.

Back

A scalene triangle is a triangle with all sides of different lengths and all angles of different measures.

Front

What is the measure of the exterior angle of a triangle?

Back

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

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length and the angles opposite those sides are equal.

Front

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

Back

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

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle measuring 90°.

Front

What is the relationship between the angles in a polygon?

Back

The sum of the interior angles of a polygon can be calculated using the formula (n-2) × 180°, where n is the number of sides.

Front

What is the measure of each angle in a regular pentagon?

Back

Each angle in a regular pentagon measures 108°.

Front

Define complementary angles.

Back

Complementary angles are two angles whose measures add up to 90°.