Angles
What does it mean to bisect an angle?
To cut the angle in half
What is a transversal line?
A line that cuts/passes through at least two other lines at distinct points
If the scale of a map of Canada is 120 km:6.28 cm. What distance would be represented by 7 cm on the map?
133.8 km
What is the formula for the Pythagorean theorem?
A2+B2=C2
What is the acronym for the three trigonometric ratios?
SOH CAH TOA
What is 118o bisected?
59o
What is special about the measure of corresponding angles between parallel lines?
They are equal
A drawing of a staircase measures 10 cm, but the actual staircase measures 650 cm. What is the scale factor?
1/65 or 1:65 or 0.0153846154
What does it mean to square something?
To multiply a number by itself once
What symbol do you use if you do not have the measure of an angle?
θ (theta)
What type of angle is 75o?
Acute angle
If you have an angle of 163o, what does the supplementary angle equal?
17o
Two triangles are considered to be similar when...
There are three possible answers. Check with your teacher.
How do you tell what side is C in Pythagorean's theorem?
The longest side or the side directly across from the 90° angle.
cos (72) = ?
0.31
What type of angle is 192o?
Reflex angle
If you have an angle of 135o, what does the same side interior angle to this angle equal?
45o
A window with a width of 5 ft and a height of 6.5 ft is similar to another window with a width of x and a height of 8.2 ft. What is x?
6.3 ft
The following are sides of a right angle triangle. Solve for side b. a = 10 cm, b = x cm, c = 17 cm
x = 13.7 cm
tan-1 (1.732) = ?
60o
What is the reflex angle of 25o?
335o
What do complementary angles add to?
90o
A triangle has one interior angle of 51°. A similar triangle has one interior angle of 90°. What are the interior angles of both triangles?
90°, 51°, and 39o
In what step is the first mistake? Why?
Step 1: 132 – 52 = x2
Step 2: 169 – 25 = x2
Step 3: 144 = x
Step 3. The x should still be x2
sin (θ) = 0.6018. What is θ?
θ = 37o