Triangle Review

Front

What is the perimeter of a triangle?

Back

The perimeter of a triangle is the sum of the lengths of all its sides.

Front

If a triangle has sides measuring 15 in, 12 in, and 13 in, what is its perimeter?

Back

40 in

Front

What type of triangle has all sides of equal length?

Back

Equilateral triangle.

Front

What type of triangle has two sides of equal length?

Back

Isosceles triangle.

Front

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

Back

Acute triangle.

Front

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

Back

Obtuse triangle.

Front

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

Back

Right triangle.

Front

If a triangle has angles measuring 70°, 60°, and 50°, what type of triangle is it?

Back

Acute triangle.

Front

What is the sum of the interior angles of a triangle?

Back

180°.

Front

If one angle of a triangle is 90°, what can you say about the other two angles?

Back

They must add up to 90°.