Identifying Triangles

Front

What is a triangle?

Back

A triangle is a three-sided polygon.

Tags

CCSS.2.G.A.1

Front

What are the types of triangles based on sides?

Back

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

Tags

CCSS.4.G.A.2

Front

What are the types of triangles based on angles?

Back

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

Tags

CCSS.4.G.A.2

Front

What is an equilateral triangle?

Back

An equilateral triangle has all three sides and all three angles equal, each angle measuring 60°.

Tags

CCSS.4.G.A.2

Front

What is an isosceles triangle?

Back

An isosceles triangle has at least two sides that are equal in 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 has all sides of different lengths and all angles of different measures.

Tags

CCSS.4.G.A.2

Front

What is a right triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

What is an obtuse triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

What is an acute triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

How do you find the missing angle in a triangle?

Back

The sum of all angles in a triangle is 180°. Subtract the sum of the known angles from 180° to find the missing angle.

Tags

CCSS.8.G.A.5