Angles of Triangles

Front

What is an equilateral triangle?

Back

A triangle with all three sides of equal length and all three angles measuring 60 degrees.

Front

How many equal sides does an equilateral triangle have?

Back

3

Front

What is an acute triangle?

Back

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

Front

Classify a triangle with one angle greater than 90 degrees.

Back

Obtuse triangle.

Front

What is a right triangle?

Back

A triangle that has one angle measuring exactly 90 degrees.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths and all angles of different measures.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length and at least two angles of equal measure.

Front

What is the sum of the angles in any triangle?

Back

180 degrees.

Front

Set up an equation to find x in the triangle with angles 52, 5x, and 16 degrees.

Back

52 + 5x + 16 = 10x + 8.

Front

If one angle of a triangle is 95 degrees, what can you say about the other two angles?

Back

They must be acute, as the sum of the angles must equal 180 degrees.