Unit 4 Triangle Properties

Front

What is the measurement of the angles in a triangle?

Back

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

Front

What is the definition of a triangle?

Back

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

Front

What are the types of triangles based on their angles?

Back

Triangles can be classified as acute (all angles < 90°), right (one angle = 90°), or obtuse (one angle > 90°).

Front

What are the types of triangles based on their sides?

Back

Triangles can be classified as equilateral (all sides equal), isosceles (two sides equal), or scalene (no sides equal).

Front

What is the Triangle Inequality Theorem?

Back

The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

How do you find the missing angle in a triangle?

Back

To find a missing angle, subtract the sum of the known angles from 180°.

Front

What is an exterior angle of a triangle?

Back

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

Front

What is the relationship between the sides and angles of a triangle?

Back

In a triangle, the larger the angle, the longer the opposite side.

Front

What is the smallest angle in a triangle with sides 4, 4, and 6?

Back

The smallest angle is opposite the shortest side, which is 4.

Front

Can a triangle be formed with sides of lengths 6, 4, and 4?

Back

Yes, these sides can form a triangle as they satisfy the Triangle Inequality Theorem.