Answer all the questions below and press submit to see how many you got right.
Circle : A circle is a two-dimensional shape. The boundary of a circle is a set of points that has the same distance (the radius) from the center of the circle.
Corner : A corner of a shape is a point in the shape such that this point does not lie on the line segment between any two other points in the shape. Every triangle has 3 corners and every quadrilateral has 4 corners.
Hexagon : A hexagon is a polygon with six corners. The sum of the angles in a hexagon is $720^{\circ}.$
Round : Round can be a property of a shape, meaning that it does not have any corners. For example a circle can be described as round. A number can be informally described as round if it does end in one or several zeros such that rounding that number to a certain number of digits does not change the number.
Shape : A shape is a set of points in space.
Square : A square is a quadrilateral with four right angles and four equal length sides. A square is a special case of a rectangle and a special case of a rhombus.
Triangle : A triangle is a polygon with three corners and three sides. You can calculate the area of a triangle by multiplying half the length of the base by the height on that base. The sum of the interior angles in a triangle is always $180^{\circ}.$
What is the name of the shape in the picture?
Count : To count means to find out the number of objects by adding one for every object.
How many sides does a triangle have?
Face : In mathematics a face of a 3-dimensional shape is any of the two-dimensional shapes that form the boundary of the three-dimensional shape. For example the 6 faces of a cube are 6 squares.
Number : A number $x$ is a mathematical symbol representing a quantity.
A triangle has three ______.