Triangles & Angles

Front

What are the conditions for three sides to form a triangle?

Back

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

Front

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

Back

An obtuse triangle.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is a right triangle?

Back

A triangle that has one angle equal to 90 degrees.

Front

How do you classify triangles based on angles?

Back

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

Front

How do you classify triangles based on sides?

Back

Triangles can be classified as scalene (all sides different), isosceles (two sides equal), or equilateral (all sides equal).

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 degrees.

Front

If one angle of a triangle is 92 degrees, what type of triangle is it?

Back

It is an obtuse triangle.

Front

What is the formula to find the missing angle in a triangle?

Back

Missing angle = 180° - (sum of the other two angles).