Triangles-Missing Angles

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

What is an acute triangle?

Back

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

Front

What is a right triangle?

Back

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

Front

What is an obtuse triangle?

Back

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

Front

What is an isosceles triangle?

Back

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

Front

What is a scalene triangle?

Back

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

Front

How do you find the measure of a missing angle in a triangle?

Back

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

Front

If two angles of a triangle are 70 degrees and 50 degrees, what is the measure of the third angle?

Back

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

Front

What is the classification of a triangle with angles measuring 30 degrees, 60 degrees, and 90 degrees?

Back

It is a right triangle.

Front

What is the measure of the missing angle if one angle is 45 degrees and another is 90 degrees?

Back

The missing angle measures 45 degrees (180 - 90 - 45 = 45).