Cards in this guide (22)
Is it possible for two skew lines to be perpendicular
perpendicular lines are lines that MEET at right angles (90
degrees). Skew lines are lines that dont meet at all. Even though
the gradients of two skew lines can multiply to be -1 (a property
of perpendicular lines) They will not really be perpendicular as
they don't accually meet. This can occur when the lines are in
different planes.
Do the angles that form a linear pair have to be adjacent
The measures of two adjacent interior angles sum to 180 because they form a linear pair.
B. False
True or false In the body of an indirect proof you must show that the assumption leads to a contradiction
True
It is true that the body of an indirect proof you must show that the assumption leads to a contradiction. In math a proof is a deductive argument for a mathematical statement.
Are collinear points also coplanar
Yes, collinear points are also coplanar.
Which of the following is the converse of the statement If it your birthday then it is September
if its September its your birthday
If you took an if then statement inserted a not in each clause and reversed the clauses the new statement would also be true
Angle formed by supplementary and complementary angles
Supplementary angles forms a 180o angle (or a straight line).
Complementary angles form a 90o angle.
Quadrilateral ABCD is a parallelogram in which angle A equals 40 degrees Which two angles below are complementary
A and B, B and C, C and D, D and A, are all supplementary
pairs.
The figure has no complementary pairs of angles.
What is the inverse of this statement
What isn't the inverse of this statement(?)
What best describes the meaning of the term theorem
A conclusion provided by deductive reasoning
What does m means in angle geometry
It means "measure". So m<AVB is saying "the measure of Angle
AVB is/= ? degrees".
What type of angle is a 154 degree angle
Which term best describes a proof in which you assume the opposite of what you want to prove
The term that best describes a proof in which you assume the
opposite of what you want to prove is 'indirect proof'.
What special marks are used to show that segments are congruent
Why can't a quadrilateral have four obtuse angles
The sum of the 4 internal angles of a quadrilateral must sum to
360° (go look up the proof of this elsewhere).
For the sake of argument, let's call the 4 internal angles of a
quadrilateral A, B, C, and D.
If they were all obtuse, then (by definition):
180° > A > 90°
180° > B > 90°
180° > C > 90°
180° > D > 90°
If you add them all up, you find that for the sum of the angles
A+B+C+D
720° > A + B + C + D > 360°
but, A+B+C+D = 360°,
Since the assumption produces a result that contradicts this,
the assumption cannot be true.
Q.E.D.
True or false in a two column proof the right column states your reasons.
True or false A corollary is a statement that can be easily proved using a theorem.
If point C is between points A and B then AC plus CB .
The real answer is Bc . Hate these @
Name the types of angles shown.
supplementary and straight
What point halfway between two endpoints of a line segment is a
It is known as the midpoint of the line segment
If A flowchart proof presents a logical argument using
Which of the following can be used to explain a statement in a geometric proof Check all that apply
Corollary.
Theorem.
Definition.
Postulate.