Triangles

Front

What is a triangle?

Back

A triangle is a three-sided polygon formed by connecting three points (vertices) with straight lines (sides).

Tags

CCSS.2.G.A.1

Front

What are the types of triangles based on side lengths?

Back

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

Tags

CCSS.4.G.A.2

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.

Tags

CCSS.4.G.A.2

Front

What is the sum of the angles in a triangle?

Back

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

Tags

CCSS.8.G.A.5

Front

If two angles in a triangle measure 30° and 60°, what is the measure of the third angle?

Back

90°

Tags

CCSS.8.G.A.5

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 equilateral triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

What is a scalene triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

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

Back

Subtract the sum of the two known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

What type of triangle has one angle greater than 90 degrees?

Back

An obtuse triangle.

Tags

CCSS.4.G.A.2