National test set by Chinese education authorities for
As shown in the figure, in square
ADJ. DC, , and foot
of perpendicular is E, A,
ii) Determine the angle
between the two planes
A, and BCP:
iii) Determine the angle
formed by lines AD and BC,
which are in different planes.
Diagnostic test set by an English university fur Egg
In the diagram (not drawn to scale), angle ABC is a right
angle, AB = BC =
i) What is the length of AC
tii) What is the area or triangle ABC (above)?
iii) What is the of the triangle ABC (above) as