Classifying Triangles

Front

What is an acute triangle?

Back

A triangle where all three angles are less than 90 degrees.

Front

What is an obtuse triangle?

Back

A triangle that has one angle greater than 90 degrees.

Front

What is a right triangle?

Back

A triangle that has one angle equal to 90 degrees.

Front

What is an equiangular triangle?

Back

A triangle where all three angles are equal, each measuring 60 degrees.

Front

What is an equilateral triangle?

Back

A triangle where all three sides are of equal length.

Front

What is an isosceles triangle?

Back

A triangle that has at least two sides of equal length.

Front

What is a scalene triangle?

Back

A triangle where all three sides are of different lengths.

Front

Classify triangle ABC if angle A = 90°, angle B = 45°, angle C = 45°.

Back

Right triangle.

Front

Classify triangle DEF if angle D = 120°, angle E = 30°, angle F = 30°.

Back

Obtuse triangle.

Front

Classify triangle GHI if all sides are 5 cm long.

Back

Equilateral triangle.