QC: 2D Geometry

Front

What is a 2D shape?

Back

A 2D shape is a flat figure that has two dimensions: length and width. Examples include squares, circles, and triangles.

Front

Define a polygon.

Back

A polygon is a closed 2D shape formed by straight line segments. Examples include triangles, quadrilaterals, and pentagons.

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 degrees.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

Define a quadrilateral.

Back

A quadrilateral is a polygon with four sides and four angles. Examples include squares, rectangles, and trapezoids.

Front

What is the formula for the area of a rectangle?

Back

The area of a rectangle is calculated using the formula: Area = length × width.

Front

What is the formula for the perimeter of a rectangle?

Back

The perimeter of a rectangle is calculated using the formula: Perimeter = 2 × (length + width).

Front

What is a circle?

Back

A circle is a 2D shape where all points are equidistant from a central point called the center.

Front

What is the formula for the area of a circle?

Back

The area of a circle is calculated using the formula: Area = π × radius².

Front

What is the formula for the circumference of a circle?

Back

The circumference of a circle is calculated using the formula: Circumference = 2 × π × radius.