Triangles

Front

What is a triangle?

Back

A triangle is a three-sided polygon.

Front

What are the types of triangles based on 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.

Front

What are the types of triangles based on sides?

Back

1. Equilateral triangle: All three sides are equal. 2. Isosceles triangle: Two sides are equal. 3. Scalene triangle: All sides are different.

Front

What is an equilateral triangle?

Back

An equilateral triangle has 3 equal sides and 3 equal angles, each measuring 60 degrees.

Front

What is an isosceles triangle?

Back

An isosceles triangle has at least two equal sides and the angles opposite those sides are equal.

Front

What is a scalene triangle?

Back

A scalene triangle has all sides of different lengths and all angles of different measures.

Front

How do you classify triangles?

Back

Triangles can be classified by the length of their sides (equilateral, isosceles, scalene) and by their angles (acute, right, obtuse).

Front

What is a right triangle?

Back

A right triangle has one angle that measures exactly 90 degrees.

Front

What is an obtuse triangle?

Back

An obtuse triangle has one angle that measures more than 90 degrees.

Front

What is an acute triangle?

Back

An acute triangle has all angles measuring less than 90 degrees.