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 of different measures.

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 an acute triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

What is an obtuse triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

What is a right triangle?

Back

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

Front

How do you classify triangles by sides?

Back

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

Tags

CCSS.4.G.A.2

Front

How do you classify triangles by angles?

Back

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

Tags

CCSS.4.G.A.2

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in any triangle is always 180 degrees.

Tags

CCSS.8.G.A.5

Front

Example of a scalene acute triangle:

Back

A triangle with sides measuring 5 cm, 6 cm, and 7 cm, with angles measuring approximately 50°, 60°, and 70°.

Tags

CCSS.4.G.A.2