Level 1
In the figure, AOB is a straight line and CO is perpendicular to OD. ∠DOE = 12 ° and ∠EOF = 148 °. Find ∠COF.
1 m
Level 2
How many right angles has the minute hand of a clock moved from 3.00 p.m. to 4.15 p.m.?
2 m
Level 1
In the figure, ABCD is a square. Find ∠x.
2 m
Level 2
ABCD is a square. Find
  1. ∠CBD
  2. Ratio between ∠CBD and ∠BDC
2 m
Level 2
ABCD is a rectangle. Given that ∠x is twice the size of ∠y, find ∠x.
2 m
Level 2
In the figure, KJN is a straight line. LMJ is an isosceles triangle and KJL is an equilateral triangle. Find ∠OJN.
2 m
Level 2
Triangle ABC is a right angle triangle. Find the length of BD.
2 m
Level 2
In the figure, MON is a straight line. Given that the ratio of ∠a to ∠b is 1 : 2, what is the value of ∠b?
2 m
Level 2
In the figure, SOT and UOV are straight lines and ∠VOW = ∠WOT. Find ∠VOW.
2 m
Level 2
In the figure, AB and CD are straight lines. The sum of two angles is the same ∠e. Which are the two angles? Give the answers in letters. (Eg a, b)
2 m