Identifying 2D Shapes Flashcard

Front

How many acute angles must an acute triangle have?

Back

3

Front

A polygon must have at least how many sides?

Back

At least three sides

Front

What type of triangle has two equal sides?

Back

Isosceles

Front

If a triangle has one angle exactly 90° and two equal sides, what type of triangle is it?

Back

Right Isosceles

Front

What is another name for a rectangle?

Back

Parallelogram

Front

What is a polygon?

Back

A closed figure with at least three straight sides.

Front

What type of triangle has all sides of different lengths?

Back

Scalene

Front

What do you call a triangle with one angle greater than 90°?

Back

Obtuse Triangle

Front

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

Back

180°

Front

What is a quadrilateral?

Back

A polygon with four sides.