Answer all the questions below and press submit to see how many you got right.
Centimeter : A centimeter ($cm$) is $\frac{1}{100}$ of a meter.
Factor : If a natural number is divisible by a second natural number, that second natural number is called a factor of the first natural number. For example the factors of 12 are 1,2,3,4,6 and 12.
Length : Length is the attribute of a one-dimensional shape that can be measured with a measuring tape.
Line : A line AB is a one-dimensional shape that includes the points A and B, all the points on the line segment in between A and B and all the points of the straight extension of the line segment beyond A and B. A line does not have an endpoint.
Scale : Scale refers to the size of a shape. A scale drawing changes a shape to a similar shape of a different size.
In a scale drawing with a scale 1:50 a line is 4 cm long. What is the actual length of the line in cm?
Area : The amount of unit squares that is needed to cover a 2-dimensional shape.
Base : When using the height of a triangle or parallelogram (for example in an area calculation), base refers to the side of the triangle or parallelogram that the height starts out at. In a logarithm $\log_{b}x$ or power $b^x$ base refers to the number $b.$
Height : In a triangle a height (or altitude) is the shortest line segment that connects a side to its opposing corner. A height of a triangle is perpendicular to the side is started at. The three heights of a triangle intersect in a point, the so called orthocenter of the triangle. In a parallelogram the height is the shortest distance between two opposing sides. In a pyramid the height is the shortest distance between the base area and the corner of the pyramid that is not part of the base area. In a prism the height is the shortest distance between the two base faces.
Parallelogram : A parallelogram is a quadrilateral with 2 pairs of parallel sides. Rectangles, rhombuses and squares are special kinds of parallelograms.
Square centimeter : Square centimeter or $cm^2$ is a unit of measurement for measuring area. 1 square centimeter is the area of a square with side length 1 $cm,$ so 10,000 $cm^2$ are one $m^2.$
What is the area in square cm of a parallelogram that has a base of 2 cm and a height of 2 cm?
Counterclockwise : Counterclockwise specifies a direction of a rotation in the opposite direction of the direction in which the hands of a clock are moving.
Point : A point is an element in a space. Shapes are made of sets of points.
Right angle : A right angle is an angle equal to $90^{\circ}.$
Right triangle : A right triangle is a triangle that has a right angle. The sides that form the right angle are called legs, the third side is called hypotenuse. The area of a right triangle is half the product of the lengths of the two legs. The Pythagorean theorem is an important theorem for right triangles that allows to calculate the third side of a right triangle given the other two.
Rotation : A rotation is a transformation that turns a shape around. A rotation turns shapes into congruent shapes.
Straight angle : A straight angle is an angle equal to $180^{\circ}.$
Which of the figures do you get if you rotate the right triangle in the upper part of the picture by $180^{\circ}$ counterclockwise?