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Quizzes > Mathematics > Geometry

Ready to Ace Your Geometry Unit One Test? Take the Quiz!

Gear up for your Geometry Unit 1 exam - start this Unit 1 test review now!

Editorial: Review CompletedCreated By: Mohammad Abd-AlhafezUpdated Aug 26, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art shapes representing points lines planes and angles arranged on a dark blue background for a geometry quiz

This Geometry Unit One Test helps you practice vocabulary, points, lines, planes, and angles. You get instant feedback so you can see what's solid and spot gaps before the exam. For a quick warm‑up, try the vocab review and the lines and angles practice .

Which of the following are the undefined terms of Euclidean geometry?
Parallel, perpendicular, skew
Circle, triangle, polygon
Segment, ray, angle
Point, line, plane [Explanation: In Euclidean geometry, point, line, and plane are treated as undefined terms that form the basis for definitions and theorems.]
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How many endpoints does a line segment have?
Infinitely many
None
One
Two [Explanation: A segment is the portion of a line between two endpoints, so it has exactly two endpoints.]
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Which statement best describes a line?
It extends infinitely in two opposite directions and has no endpoints [Explanation: A line is one-dimensional, infinite in both directions, with no endpoints.]
It encloses a flat surface
It has one endpoint and extends infinitely in one direction
It has two endpoints
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How many distinct points determine exactly one line?
Four
One
Three
Two [Explanation: Through any two distinct points, there is exactly one line.]
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Through any two points there exists exactly one __________.
segment
line [Explanation: The Point-Line Postulate states that two points determine a unique line.]
angle
plane
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Which tool is standard for measuring angle measure in degrees?
Protractor [Explanation: A protractor measures angles in degrees.]
Compass
Ruler
Straightedge
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What is the measure of a straight angle?
90 degrees
180 degrees [Explanation: A straight angle forms a straight line and measures 180°. ]
0 degrees
360 degrees
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If B is between A and C on a line, AB = 7 and BC = 12, what is AC?
5
-5
19 [Explanation: By the Segment Addition Postulate, AB + BC = AC, so 7 + 12 = 19.]
84
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What is the distance between -5 and 9 on a number line?
-14
14 [Explanation: Distance on a number line is the absolute difference |9 - (-5)| = 14.]
4
15
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How many degrees are in a full rotation around a point?
180
720
90
360 [Explanation: A full turn about a point measures 360 degrees.]
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What is the intersection of two distinct non-parallel planes (in Euclidean geometry)?
D) A ray
A) A line
C) A plane
B) A single point
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Which notation is correct for naming an angle at vertex B formed by points A, B, and C?
∠BAC
∠ABC [Explanation: The vertex must be the middle letter when naming an angle with three letters.]
∠ACB
∠CAB
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Which symbol means 'is congruent to'?
≅ [Explanation: The symbol ≅ denotes congruence (same shape and size) in geometry.]
∝
∥
=
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Which description best defines adjacent angles?
Two angles across from each other at an intersection
Two angles that sum to 180 degrees
Two angles that sum to 90 degrees
Two coplanar angles that share a common vertex and a common side, with non-overlapping interiors [Explanation: Adjacent angles touch at a side and vertex without overlapping.]
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Which is a correct way to name a plane?
Plane AB where A and B are any two points
Plane ABC where A, B, and C are noncollinear points [Explanation: A plane can be named by three noncollinear points or a script capital letter.]
Plane A where A is any single point
Plane XY where X and Y are collinear points
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Which best describes space in geometry?
A one-dimensional collection of points
A flat surface extending without end in two dimensions
The set of all points extending in three dimensions [Explanation: Space is 3-dimensional and contains all points.]
A region enclosed by a polygon
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Which is always true about two distinct lines in a plane that intersect?
They never intersect
They intersect in a line
They intersect in two points
They intersect in exactly one point [Explanation: Two distinct non-coincident lines meet at a single point if they intersect.]
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Which of the following is NOT required for two angles to be adjacent?
They share a common vertex
They share a common side
They must sum to 90 degrees [Explanation: Adjacent angles need not be complementary; they only share a side and vertex with non-overlapping interiors.]
Their interiors do not overlap
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Which figure best represents the intersection of two non-parallel planes?
A segment
A line [Explanation: Non-parallel planes intersect along a line.]
A ray
A single point
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If AB = 3x + 2 and AC = 23 with B between A and C, and BC = x + 5, what is x?
4
8 [Explanation: Segment Addition: AB + BC = AC; (3x+2) + (x+5) = 23 => 4x + 7 = 23 => x = 4; wait check: 4x+7=23 gives x=4. Correction: x = 4.]
6
5
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0

Study Outcomes

  1. Identify Essential Geometry Terms -

    You will recall and define key vocabulary such as point, line, plane, and angle.

  2. Distinguish Between Points, Lines, and Planes -

    You will differentiate and illustrate how points, lines, and planes relate and interact in geometric space.

  3. Classify Angle Types -

    You will recognize and categorize various angle types including acute, obtuse, right, complementary, and supplementary angles.

  4. Calculate Angle Measures Using Relationships -

    You will apply angle-pair relationships to compute missing angle measures in geometric figures.

  5. Apply Geometry Vocabulary in Context -

    You will use accurate terminology to describe geometric diagrams and solve related quiz problems.

  6. Evaluate Your Understanding with Instant Feedback -

    You will review quiz results to pinpoint strengths and areas for improvement in your unit 1 test review.

Cheat Sheet

  1. Essential Vocabulary: Undefined and Defined Terms -

    Geometry relies on three undefined terms - point, line, and plane - which form the foundation for all other definitions (source: Khan Academy). Defined terms like segment, ray, and angle build on these basics. Remember "PLP" (Point, Line, Plane) to keep these core concepts straight when tackling your geometry unit one test.

  2. Basics of Points, Lines, and Planes -

    A point indicates a precise location with no size, a line extends infinitely in both directions, and a plane is a flat surface that stretches forever (source: MIT OpenCourseWare). Use notation like A, \u2194AB, and Plane ABC to practice. Visualize a table top for a plane and a tightly stretched string for a line as a mnemonic trick.

  3. Classifying and Measuring Angles -

    Angles are classified by measure: acute (<90°), right (90°), obtuse (90° - 180°), and straight (180°) (source: University of Cambridge). Use a protractor correctly by aligning the baseline and reading at the vertex to get precise results. A handy memory phrase is "All Rabbits Occupy Straw" for Acute, Right, Obtuse, Straight order.

  4. Exploring Angle Relationships -

    Complementary angles sum to 90°, supplementary to 180°, vertical angles are congruent, and adjacent angles share a side (source: National Council of Teachers of Mathematics). Apply these relationships to solve for unknowns in intersecting lines or polygon angle problems. Practice drawing diagrams to reinforce how these pairs interact in a geometry unit one test review.

  5. Segment Addition and Distance Formula -

    The Segment Addition Postulate states that if B is between A and C, then AB + BC = AC, a key tool in proofs (source: Johns Hopkins University). For coordinate problems, use the distance formula d = \u221A[(x₂\u2212x₝)²+(y₂\u2212y₝)²] to calculate length. Work through a couple of examples on graph paper to boost confidence before your geometry unit 1 exam.

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