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Basic Geometrical Ideas — Chapter Test

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Q1
Which of these has exactly one endpoint?
A ray has one endpoint and extends in one direction.
Q2
Parallel lines never ___ ?
Parallel lines never meet.
Q3
A straight angle is to 180° as a right angle is to ___ ?
A right angle is 90°.
Q4
An angle of 120° is a ___ angle.
Between 90° and 180° is obtuse.
Q5
A line segment has ___ endpoints.
A line segment has two endpoints.
Q6
An angle of 95° is ___ ?
Just over 90°, so obtuse.
Q7
A circle has a radius of 7 cm. What is its diameter?
Diameter = 2 × 7 = 14 cm.
Q8
A triangle has ___ sides.
A triangle has 3 sides.
Q9
The longest chord of a circle is the ___ ?
The diameter is the longest chord.
Q10
An angle of 30° is ___ ?
Less than 90° is acute.
Q11
Railway tracks are a real-life example of ___ ?
Railway tracks stay the same distance apart, so they are parallel lines.
Q12
At 3 o'clock the hands of a clock make a ___ angle.
At 3:00 the hands are 90° apart — a right angle.
Q13
How many line segments can be drawn joining two given points?
Exactly one line segment joins two points.
Q14
A circle has a diameter of 18 cm. What is its radius?
Radius = 18 ÷ 2 = 9 cm.
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