Answer all the questions below and press submit to see how many you got right.
Area : The amount of unit squares that is needed to cover a 2-dimensional shape.
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.
Rectangle : A rectangle is a quadrilateral with 4 right angles. Two opposing sides in a rectangle have the same length. They are sometimes referred to as the width and the length of the rectangle. To calculate the area of an rectangle one can multiply the width of the rectangle by the length of the rectangle. A square is the special case of a rectangle in which all side lengths are the same. Every rectangle is a parallelogram.
Scale : Scale refers to the size of a shape. A scale drawing changes a shape to a similar shape of a different size.
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 $m^2.$
In a scale drawing with a scale 1:10 a rectangle is 5 cm long and 5 cm wide. What is the actual area of the rectangle in $cm^2$?
Counterclockwise : Counterclockwise specifies a direction of a rotation in the opposite direction of the direction in which the hands of a clock are moving.
Leg of a right triangle : A leg of a right triangle is one of the two sides in a right triangle that form the right angle.
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 figure E in the upper part of the picture by $180^{\circ}$ counterclockwise?
Addition : Addition is the mathematical operation that describes increasing a number by an amount equal to a second number. The mathematical symbol for addition is the plus sign $+.$ The term addition is also used for a generalization of this basic operation on numbers to functions, vectors and matrices.
Alternate interior angle : When two parallel lines are crossed by a third line, alternate interior angles are a pair of angles that are between the two parallel lines and are on opposites sides of the crossing line. Alternate interior angles are equal.
Angle : If two line segments (or rays) both start at a common point the opening between the two line segments is called an angle. The common point is called vertex of the angle. The size of an angle is measured in degrees.
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.
Parallel : Two lines in a two-dimensional plane are called parallel if they never cross.
Which statements are true about the angles $a, b, c, d, e, f, g$ and $h$ at the crossings of the line EF with the parallel lines AB and CD in the picture above?