Unit 1
The number of degrees in a straight angle is
180 degrees
Quadrilateral ABCD undergoes a transformation, Producing quadrilateral A'B'C'D'. For which transformation would the area of A'B'C'D' not be equal to the area of ABCD?
Dilation
longest , opposite
The central angle ABC of a circle measures 60 degrees. That means that the minor arc AC measures __________.
60 degrees
two lines that are the same distance apart and will never touch
What is parallel lines
The measures of two angles of a triangle are 70 and 55. This triangle is
an isosceles triangle
A three-inch line segment is dilated by a scale factor of 6 and centered at its midpoint. What is the length of its
image?
18
The formula a2 + b2 = c2 is called the ______________. It is used to find all the sides of ____________ triangles.
(Must be spelled right)
Pythagorean Theorem , right triangles
A secant line intersects a circle ________.
twice
lines that intersect to form a right angle
What is perpendicular
Name two angles that are supplementary
The sum of your two angles must be 180 degrees
An equalateral triangle is rotated about its center. What is the minimum angle of rotational symmetry?
120 degrees
If the lengths of the legs of a right triangle are 2 and 3, then the length of its hypotenuse is
25
If an arc measures 80 degrees, the inscribed angle is ___________.
40
Name two angles that are complementary
The sum of your two angles must be 90 degrees
A regular pentagon is rotated about its center. What is the minimum number of degrees needed to carry the
pentagon onto itself?
72 degrees
The expression sin57
is equal to
cos33 degrees
25
This is the term for a 90 degree angle
What is right angle
In triangle ABC, angle B is 90 degrees and angle A is 45. How much is angle C?
A rectangle has a length of 5 inches and a width of 2 inches. Now, if we increase the size of this rectangle by a scale factor of 3.5, the sides will become ________ and _________ inches.
17.5 inches and 7 inches
A support wire reaches from the top of a pole to a clamp on the ground. The pole is perpendicular to the level ground and the clamp is 10 feet from the base of the pole. The support wire makes a 68 angle with the ground.
Find the length of the support wire to the nearest foot.
(Just set up the equation)
cos68/1 = 10/x
The formula to find the vertex inside for two intercepting chords on a circle is __________________.
Arc1 + Arc2 / 2 = angle x
A boat has a sail with one pair of perpendicular lines, and two sides the same length. What kind of triangle is it?
What is Right, isosceles