All Tasks
Set up a linear equation
Ron is 6 times as old as Lilly. The age difference between the two is 10 years.
How old is Lilly?
Write an equation for Lilly's age using the variable x for her age.
# Terms with variables
Reasoning
7
Angles of triangles
In this isosceles triangle, the angles at the base are twice the angle b at the apex.
Choose a suitable equation that you can use to calculate the angle b.
# Triangles
# Angles
Training
7
Perimeter kite
In a kite-rectangle, one side is three times as long as the other x. Cross all terms that can be used to determine the perimeter of the figure.
# Terms with variables
Modeling
7
Sequence of triangles 1
Determine the numbers of small trinagles for the given step.
# Quadratic functions
Modeling
7
Sequence of squares 1
Determine the numbers of small squares for the given step.
# Numerical expressions
Modeling
8
perimeter trapzoid
In a symmetrical trapezoid, the two parallel sides a and c together are twice as long as the sum of the other two sides. Cross a term that can be used to determine the perimeter of the figure.
# Terms with variables
Modeling
7