Geometry Triangles

Front

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

Back

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

Front

What type of triangle has all angles less than 90 degrees?

Back

An acute triangle has all angles less than 90 degrees.

Front

What type of triangle has one angle greater than 90 degrees?

Back

An obtuse triangle has one angle greater than 90 degrees.

Front

What type of triangle has one angle equal to 90 degrees?

Back

A right triangle has one angle equal to 90 degrees.

Front

If a triangle has angles measuring 30°, 60°, and 90°, what type of triangle is it?

Back

It is a right triangle.

Front

Can a triangle have angles measuring 55°, 45°, and 90°?

Back

No, a triangle cannot have angles measuring 55°, 45°, and 90° because the sum exceeds 180 degrees.

Front

What is the relationship between the angles in a triangle?

Back

The angles in a triangle must sum to 180 degrees.

Front

If two angles of a triangle are known, how can the third angle be found?

Back

The third angle can be found by subtracting the sum of the known angles from 180 degrees.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle where all three sides and all three angles are equal.

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle with at least two sides of equal length and the angles opposite those sides are equal.