Page 68 - NUMINO Challenge_B2
P. 68
Problem solving Key Points
1 Square ABCD is made up of four squares of The angle of
equal size. A laser is fired from point A, reflects incidence and the
off point C, and arrives at point D. Find the sum angle of reflection
of the two colored angles. are always equal to
each other.
AE
BH C
2 Two squares of the same size are placed next to When a square is
each other. Three lines are drawn, as shown split along its
below. Find the measure of angle . diagonal, two
triangles of equal
E size are formed.
AD
72
BFC
Shapes 65
1 Square ABCD is made up of four squares of The angle of
equal size. A laser is fired from point A, reflects incidence and the
off point C, and arrives at point D. Find the sum angle of reflection
of the two colored angles. are always equal to
each other.
AE
BH C
2 Two squares of the same size are placed next to When a square is
each other. Three lines are drawn, as shown split along its
below. Find the measure of angle . diagonal, two
triangles of equal
E size are formed.
AD
72
BFC
Shapes 65
