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Triangles
Geometry Vocabulary
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100
A scalene triangle.
What is a triangle with no congruent sides?
100
An angle with a measure between 0° and 90°
What is an acute angle?
100
A = a²
What is the formula for the area of a square?
100
55z-3(9z + 12) =
What is z= -1?
100
Vertical angles are congruent.
What is the Vertical Angles Theorem?
200
A= 1/2 x b x h
What is the formula for the area of a triangle?
200
A statement that contains the phrase "if and only if"
What is a biconditional statement?
200
A= pi r²
What is the formula for the area of a circle?
200
23 + 11d - 2c = 12 - 2c
What is d = -1?
200
If a = b, then a + c = b + c
What is addition property?
300
m
What is the Triangle Sum Theorem?
300
An unproven statement that is based on observations.
What is a conjecture?
300
P= a + b + c
What is the formula for the perimeter of a triangle?
300
(78 - 29) 7 x 10 - 29 + 12 =
What is 3,413?
300
c² = a² + b²
What is the Pythagorean Theorem?
400
Every triangle is congruent to itself.
What is the reflexive property of congruent triangles?
400
A statement that can be proved easily using a theorem or a definition.
What is a corollary?
400
V= pi r² h
What is the formula for the volume of a cylinder?
400
x + 8x - 10x + x + 7x =
What is x = 7?
400
Six less than seven times thirteen
What is eighty-five?
500
If two angles of one triangle are congruent to two angles of another triangle, then the third angles are also congruent.
What is the Third Angles Theorem?
500
A rule that is accepted without proof. Also called an axiom.
What is a postulate?
500
V= pi r² h/3
What is the formula for the volume of a cone?
500
7y - 50 + 5 = 2y + 90 =
What is y = 135?
500
A segment that intersects a circle in two points, with one point as an endpoint of the segment.
What is a Secant Segment?