Unique triangles

Front

What is a unique triangle?

Back

A unique triangle is a triangle that can be formed with a specific set of angle measures or side lengths, meaning no other triangle can have the same measurements.

Tags

CCSS.8.G.A.2

Front

How many triangles can be formed with angle measures of 55°, 45°, and 90°?

Back

No triangle exists.

Tags

CCSS.7.G.A.2

Front

What is the triangle inequality theorem?

Back

The triangle inequality theorem states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

Which set of side lengths can form a triangle? 6, 8, 13 or 7, 9, 18 or 7, 7, 14 or 2, 6, 9?

Back

6, 8, 13.

Tags

CCSS.7.G.A.2

Front

How many triangles can be created with the side lengths of 3 cm, 4 cm, and 5 cm?

Back

Only 1 unique triangle.

Tags

CCSS.7.G.A.2

Front

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

Back

An acute triangle.

Tags

CCSS.4.G.A.2

Front

What type of triangle has one angle equal to 90°?

Back

A right triangle.

Tags

CCSS.4.G.A.2

Front

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

Back

An obtuse triangle.

Tags

CCSS.4.G.A.2

Front

If two angles of a triangle are 30° and 70°, what is the measure of the third angle?

Back

80°.

Tags

CCSS.8.G.A.5

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°.

Tags

CCSS.8.G.A.5