Identify Triangles and Read Angles

Front

What is an acute triangle?

Back

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

Front

What is an obtuse triangle?

Back

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

Front

What is a right triangle?

Back

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

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle where all three sides are of equal length and all angles are equal to 60 degrees.

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle where all three sides are of different lengths.

Front

How do you identify an acute triangle?

Back

You can identify an acute triangle by measuring its angles; if all angles are less than 90 degrees, it is acute.

Front

How do you identify an obtuse triangle?

Back

You can identify an obtuse triangle by measuring its angles; if one angle is greater than 90 degrees, it is obtuse.

Front

How do you identify a right triangle?

Back

You can identify a right triangle by measuring its angles; if one angle is exactly 90 degrees, it is a right triangle.

Front

What is the sum of the angles in any triangle?

Back

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