WASHINGTON STATE MATHEMATICS COUNCIL

1997 MIDDLE SCHOOL MATH OLYMPIAD

FIFTH GRADE SPATIAL SENSE

SCHOOL ___________________________ TEAM_______

1). If you are allowed to slide, turn or flip (but not stretch) the following figures, which two figures are identical (congruent)?

Answer:_________

2). Zarina has to go to the store to buy milk. She has a choice of 4 stores, shown on the graph. She cannot take shortcuts; she must travel by road. Which store is closest to her home?

Answer:_________

3). Find the area of this figure. The dots are in a regular grid. Grid points are spaced 1 cm apart.

Answer:_________

4). Lines A and B are perpendicular. Lines C and D are parallel. If angle X is 65 degrees, what is the measure of angle Y?

Answer:_________

5). If the angles in a triangle add up to 180 degrees, and the angles in a square add up to 360 degrees and the angles in a pentagon add to 540 degrees, what is the sum of the angles in an octagon?

Answer:_________