5.1 Angles of Triangles

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 and all three angles are 60 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

How do you find the third angle of a triangle?

Back

Subtract the sum of the two known angles from 180 degrees.

Front

What is the sum of the angles in any triangle?

Back

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

Front

What is a right triangle?

Back

A triangle that has one angle equal to 90 degrees.

Front

What is an acute triangle?

Back

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

Front

If one angle of a triangle is 79 degrees and another is 43 degrees, what is the third angle?

Back

58 degrees.

Front

Classify a triangle with angles measuring 30, 60, and 90 degrees.

Back

It is a right triangle.