Question:

Level 1

In the figure, AOB is a straight line and CO is perpendicular to OD. ∠DOE = 12 ° and ∠EOF = 148 °. Find ∠COF.

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
How many right angles has the minute hand of a clock moved from 3.00 p.m. to 4.15 p.m.?

Level 2

ABCD is a square. Find

ABCD is a square. Find

- ∠CBD
- Ratio between ∠CBD and ∠BDC

2 m

Level 2

ABCD is a rectangle. Given that ∠x is twice the size of ∠y, find ∠x.

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.

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.

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?

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.

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)

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