Geometrical Relationships
What is a ray?
A line with one endpoint that extends forever in one direction.
Find the supplementary angle to 40°.
140°
What is the longest side of a right-angled triangle called?
Hypotenuse
What does "exact form" mean?
Leaving the answer as a square root.
Which average is affected most by outliers?
Mean
What is the median?
Middle value
Another way to write 0.5
1/2
How many degrees in a right angle?
90°
What do adjacent angles share?
A common arm and common vertex.
Find the complementary angle to 25°.
65°
What theorem helps us find missing sides in right-angled triangles?
Pythagoras' Theorem
Which answer is exact form?
A) 7.8
B) √61
√61
A graph with one peak is called?
Unimodal
What is the mode?
Most common value
25% of 80
20
How many degrees in a straight angle?
180°
What are supplementary angles?
Angles that add to 180°.
Two supplementary angles are equal. What is each angle?
90°
A triangle has sides 3 cm and 4 cm. Find the hypotenuse.
5 cm
Convert √81 into decimal form.
9
A graph with two peaks is called?
Bimodal
What is the range?
Largest − smallest
A movie starts at 7:45 pm and finishes at 10:10 pm.
2 hours 25 minutes
How many degrees in a revolution?
360°
What are complementary angles?
Angles that add to 90°.
One angle is 72°. Its supplementary angle is?
108°
A triangle has hypotenuse 13 cm and one side 5 cm. Find the missing side.
12 cm
A student writes:
√50 = 7.07
Is this exact or decimal form?
Decimal form
Find the range:
12, 15, 18, 25
13
What is a census?
Data collected from every member of a population.
A scale is 1:100 000. What does 1 cm represent?
1 km
A pattern increases by 7:
4, 11, 18, 25, ___
32
Name the angle relationship:
Two angles are in the same position when a transversal crosses parallel lines.
Corresponding angles.
Two supplementary angles differ by 40°. Find both angles.
70° and 110°
Without calculating, explain whether you would add or subtract:
Hypotenuse known = 20 cm
One side known = 8 cm
Subtract because the missing side is a short side.
Find the error:
c² = 25 + 144
c² = 169
c = 169
Need √169 = 13
Which graph is best for continuous data?
Histogram
Why might a sample be biased?
It doesn't fairly represent the population.
A recipe uses 4 cups of flour for 16 muffins.
How much flour for 28 muffins?
7 cups
Four workers paint a fence in 6 hours.
How long would two workers take?
12 hours