TEKS 4.6D classify two-dimensional figures

What is a 2-D shape?

• A shape that has length and width but no depth.

• A shape that has length, width, and height.

• A shape that can be folded into three dimensions.

• A shape that only exists in a computer program.

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

• 90°

• 180°

• 360°

• 270°

What does congruent mean?

• Congruent means same size and same shape.

• Congruent means different sizes but same shape.

• Congruent means same size but different shapes.

• Congruent means neither size nor shape is the same.

What are the properties of a parallelogram?

• A parallelogram has 2 pairs of parallel sides and 2 pairs of sides of equal lengths.

• A parallelogram has only one pair of parallel sides.

• A parallelogram has four sides of different lengths.

• A parallelogram is a triangle with equal angles.

What is a quadrilateral?

• A polygon with 3 sides.

• A polygon with 4 sides.

• A polygon with 5 sides.

• A polygon with 6 sides.

What is a vertex in a polygon?

• A point where two sides of a polygon meet.

• A line segment connecting two vertices.

• The area enclosed by the sides of a polygon.

• The angle formed by two intersecting lines.

What is a regular polygon?

• A polygon with all sides and angles equal.

• A polygon with unequal sides and angles.

• A polygon that has at least one right angle.

• A polygon that can be inscribed in a circle.

What is an obtuse angle?

• An angle that is less than 90°.

• An angle that is exactly 90°.

• An angle that is greater than 90° but less than 180°.

• An angle that is greater than 180°.

What is a polygon?

• A polygon is a 2-D shape formed by three or more straight sides.

• A polygon is a 3-D shape with curved surfaces.

• A polygon is a shape with only one straight side.

• A polygon is a closed figure with no sides.

What is the difference between a convex and concave polygon?

• A convex polygon has all interior angles less than 90°, while a concave polygon has at least one interior angle greater than 90°.

• A convex polygon has all interior angles less than 180°, while a concave polygon has at least one interior angle greater than 180°.

• A convex polygon has at least one interior angle greater than 180°, while a concave polygon has all interior angles less than 180°.

• A convex polygon has all sides equal, while a concave polygon has unequal sides.