#5.1 Angles of Triangles

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is always 180 degrees.

Front

Define an acute triangle.

Back

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

Front

Define a right triangle.

Back

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

Front

Define an obtuse triangle.

Back

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

Front

What is a scalene triangle?

Back

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

Front

What is an isosceles triangle?

Back

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

Front

How do you find the missing angle in a triangle?

Back

To find the missing angle in a triangle, subtract the sum of the known angles from 180 degrees.

Front

If two angles of a triangle are 50 degrees and 60 degrees, what is the third angle?

Back

The third angle is 70 degrees (180 - 50 - 60 = 70).

Front

What is the relationship between the angles in a triangle?

Back

The angles in a triangle are related such that their sum is always 180 degrees.

Front

Classify a triangle with sides of lengths 5, 5, and 8.

Back

The triangle is an isosceles triangle.