Triangles (names/SIA/Ex Angles)

Front

What is an obtuse triangle?

Back

A triangle with one angle greater than 90 degrees.

Front

What is an equilateral triangle?

Back

A triangle where all three sides are equal in length and all angles are 60 degrees.

Front

What is the sum of the angles in a triangle?

Back

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

Front

What is an acute triangle?

Back

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

Front

What is a right triangle?

Back

A triangle that has one angle equal to 90 degrees.

Front

What is an isosceles triangle?

Back

A triangle with 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

If one angle of a triangle is 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Front

If a triangle has angles measuring 33° and 136°, what is the measure of the third angle?

Back

The third angle measures 11°.

Front

What type of angle is greater than 90 degrees?

Back

Obtuse angle.