Math Vocabulary Unit 1: Geometry What am I? ©Mrs. DeAmicis

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 straight path 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! <

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!