5.1 - 5.2 Flashcard Review

Front

What is an Equiangular Triangle?

Back

A triangle where all three angles are equal, and consequently, all three sides are also equal.

Front

Define 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 the angles opposite those sides are equal.

Front

How do you classify a triangle based on its angles?

Back

Triangles can be classified as acute (all angles < 90°), right (one angle = 90°), or obtuse (one angle > 90°).

Front

What is the largest angle in a triangle?

Back

The largest angle is opposite the longest side of the triangle.

Front

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

Back

Use the triangle sum theorem: the sum of the interior angles of a triangle is always 180°.

Front

What is the definition of an Acute Triangle?

Back

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

Front

What is an Obtuse Triangle?

Back

A triangle that has one angle greater than 90°.

Front

What is the longest side of a triangle called?

Back

The longest side of a triangle is called the hypotenuse in a right triangle, and it is opposite the largest angle in any triangle.

Front

How do you classify a triangle by its sides?

Back

Triangles can be classified as equilateral (all sides equal), isosceles (two sides equal), or scalene (all sides different).