Classifying Triangles

Front

What are the three main classifications of triangles based on their angles?

Back

1. Acute Triangle: All angles are less than 90 degrees. 2. Right Triangle: One angle is exactly 90 degrees. 3. Obtuse Triangle: One angle is greater than 90 degrees.

Tags

CCSS.4.G.A.2

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are of equal length and all three angles are equal, each measuring 60 degrees.

Tags

CCSS.4.G.A.2

Front

What is an isosceles triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle in which all three sides are of different lengths and all three angles are different.

Tags

CCSS.4.G.A.2

Front

How can you classify a triangle with one angle measuring 120 degrees?

Back

It is classified as an obtuse triangle because it has one angle greater than 90 degrees.

Tags

CCSS.4.G.A.2

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.

Tags

CCSS.8.G.A.5

Front

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

Back

An acute triangle.

Tags

CCSS.4.G.A.2

Front

If a triangle has two equal sides, what can you say about its angles?

Back

The angles opposite the equal sides are also equal.

Tags

CCSS.HSG.CO.C.10

Front

What is the relationship between the sides and angles in a triangle?

Back

In a triangle, the larger the angle, the longer the side opposite that angle.

Tags

CCSS.HSG.CO.C.10

Front

How do you determine if a triangle is right-angled?

Back

A triangle is right-angled if one of its angles measures exactly 90 degrees.

Tags

CCSS.2.G.A.1