Triangle Construction

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 are the three types of triangles based on angles?

Back

The three types of triangles based on angles are acute triangle (all angles < 90°), right triangle (one angle = 90°), and obtuse triangle (one angle > 90°).

Front

What is an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90°.

Front

What is a right triangle?

Back

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

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle greater than 90°.

Front

What is the Triangle Inequality Theorem?

Back

The Triangle Inequality Theorem states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

If two angles of a triangle are known, how can the third angle be found?

Back

The third angle can be found by subtracting the sum of the known angles from 180°.

Front

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

Back

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

Front

How many unique triangles can be formed with three given angles?

Back

Only 1 unique triangle can be formed with three given angles.

Front

How many unique triangles can be formed with two sides and the included angle?

Back

Only 1 unique triangle can be formed with two sides and the included angle.