Question 33
Geometry – Aug. ’23 [65]
33 A telephone pole 11 meters tall needs to be stabilized with a support beam, as modeled below.
11 m
Support beam
Two conditions for proper support are:
• The beam reaches the telephone pole at 70% of the telephone pole’s height above the
ground.
• The beam forms a 65° angle with the ground.
Determine and state, to the nearest tenth of a meter, the length of the support beam that meets
these conditions for this telephone pole.
Determine and state, to the nearest tenth of a meter, how far the support beam must be placed
from the base of the pole to meet the conditions.
Geometry – Aug. ’23 [20]
33 A telephone pole 11 meters tall needs to be stabilized with a support beam, as modeled below.
11 m
Support beam
Two conditions for proper support are:
• The beam reaches the telephone pole at 70% of the telephone pole’s height above the
ground.
• The beam forms a 65° angle with the ground.
Determine and state, to the nearest tenth of a meter, the length of the support beam that meets
these conditions for this telephone pole.
Determine and state, to the nearest tenth of a meter, how far the support beam must be placed
from the base of the pole to meet the conditions.
Geometry – Aug. ’23 [20]
33 A telephone pole 11 meters tall needs to be stabilized with a support beam, as modeled below.
11 m
Support beam
Two conditions for proper support are:
• The beam reaches the telephone pole at 70% of the telephone pole’s height above the
ground.
• The beam forms a 65° angle with the ground.
Determine and state, to the nearest tenth of a meter, the length of the support beam that meets
these conditions for this telephone pole.
Determine and state, to the nearest tenth of a meter, how far the support beam must be placed
from the base of the pole to meet the conditions.
Score 2: The student used an incorrect height and made a computational error when determining
the length of the support beam. The student found an appropriate distance from the
bottom of the support beam to the base of the pole.