What are the lines of symmetry we learned about?
Horizontal, vertical, and oblique
Translate the point (-4,-5) down 4 and right 17. What is the point now?
( 13,-9)
How many edges does a triangular prism have?
9 edges
An angle formed by two radii of the circle.
A Central Angle
A line that goes from one side of a circle to the other side of a circle.
What is a Chord?
The point where a tangent touches a circle.
The point of tangency
How many lines of symmetry does a regular nonagon have?
Nine
Rotate the point (4,6) clockwise 180° about the origin.
( -4,-6)
What would the expression be to solve this surface area question? (You do NOT have to solve it!)
SA = 2(l*w) + 2(l*w) + 2 (l*w) + (pi)dh - 2(pi)r2
These types of angles are equal when subtended by the same arc.
Inscribed angles.
The radius does this to a chord when they are perpendicular.
Bisect it.
What is angle ECF?
Angle ECF = 42°
For this image what is the order, rotational symmetry in degrees, and as a fraction?
Order = 8
Degrees = 45°
Fraction = 1/8
Rotate the point (7,8) counterclockwise 270° about the origin.
(8,-7)
Imagine that the object is cut in half at the blue line. If the two pieces are separated, how much has the surface area of each half increased?
6 x 10 = 60cm2
All inscribed angles subtended by a semicircle are this.
A right angle or 90°.
CD bisects chord AB. The radius of the circle is 15 cm long. Chord AB measures 24 cm. What is the length of CE?
9cm
Find the missing angle.
170° - 140° = 30°
180° - 30° - 90° = 60°
60°
Name all the capital letters that have a rotational symmetry of 180°.
H, I, N, O, S, X, and Z
Reflect the point (5,6) over the x-axis, then the y axis, then the line x=y.
(-6,-5)
What is the surface area of this composite object?
1244cm2
What are angles STU, TUV and SRT?
Angle STU: 36°
Angle TUV: 42°
Angle SRT: 102°
Water is flowing through a pipe with radius 14 cm. The maximum depth of the water is 9 cm. This is the width of the surface of the water.
What is 26.2 cm?
A speed skater is practicing on a circular track with a radius of 20 m. He falls and slides off the track in a line tangent to the circle. If he slides 8m, how far is he from the center of the rink?
21.54cm
Ignoring the different length in the two clock hands, at what two times will the clock have the best vertical line symmetry?
- 12:00
- 6:00
Points A(4, 4) and B(6, 1) are translated (x-8, y) to form a parallelogram. What is its area?
24 units2
Adam built this shed and wants to paint the whole thing, excluding the bottom. One can of paint covers 4m2. How many cans of paint does adam need to buy?
SA = 60cm2
Cans of paint: 60/4 = 15
Find the values of x and y.
x = 95°
y = 55°
A rectangle is inscribed in a circle with radius 7 cm. The length of the rectangle is 12 cm. This is the width of the rectangle.
7.2cm
Diameter of 20 cm. What is the total length of chain needed to hang the suncatcher.
43.6cm