Math VocabularyUnit 1: Geometry

What am I?

©Mrs. DeAmicis - 2009

See if you can correctly name the geometry terms!

Try using the clues in the sentences to name the term.

I am a location in space. What am I called?

point!

.

I am made up of two points and

the straightpath between

them. What am I?

line segment!

We are the two points in a line segment.

What are we?

endpoints!

I am a straight path that has a starting point and goes on forever in one direction. What am I?

ray!

I am a straight path that goes on forever in both directions.

What am I?

line!

I am formed by 2 rays or 2 line segments that share the same endpoint. What am I?

angle!

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I am the point where the rays of an angle,

the sides of a polygon, or the

edges of a polyhedron meet.

vertex

I am an angle that measures 90°. What am I called?

right angle

L

I am an angle that measures between

0° and 90°. What am I?

acute angle

>

I am the angle that measures between 90° and 180°. Who am I?

obtuse angle

∑

I am an angle that measures 180°. What

am I?

straight angle

I am an angle that measures between 180° and 360°. What

am I called?

reflex angle

I am a shape with three sides.What am I?

triangle

I am a polygon that has four sides and

four angles. What am I?

quadrangle or quadrilateral

How many quadrangles can you

name?

I am a quadrilateral that has two pairs of

parallel sides. My opposite sides are

congruent.

parallelogram

I am a closed, 2-dimensional figure that

is made up of line segments joined end to end. My line segments

may not cross.

polygon

I am a polygon in which at least one vertex is “pushed

in.” What am I called?

concave polygon

I am a polygon in which all vertices are “pushed outward.” What am I called?

convex polygon

I’m a quadrilateral whose sides are all

the same length. What is my name?

rhombus

I am a quadrilateral that has exactly one pair of parallel sides.

What am I?

trapezoid

Well Done!