Geometry Word Search and

Scavenger Hunt

Angleformed by two lines, or rays,

which meet at a point called the vertex.

Vertex• The point where two rays meet to form an

angle.

APoint A is the vertex of the angle. It can be used to name the angle with only one letter.

Degree• The unit used to measure the size of an

angle. One degree represents 1/360 of a circle. The symbol is °.

Acute Angle• An angle that measures

between 0° and 90°.

A

B C

<B or <ABC or <CBA

Obtuse Angle• An angle which measures

between 90° and 180°.

D

O G

<O or <DOG or <GOD

Right Angle• An angle which measures

exactly 90°. C

A T

<A or <CAT or <TAC

Straight Angle• A straight line which

measures exactly 180°.

Complementary Angles

• two angles which add together to be 90°.

J J O

BY

< JOY and <BOY are complementary angles. They form the right <JOB

Supplementary Angles

• Two angles whose measurements add to 180°.

CA

R

J

<CAR and <JAR are supplementary angles. They form the straight <CAJ

Vertical Angles• Formed by two intersecting

lines which form two pairs of opposite angles which are congruent (equal).

12

34

<‘s 1 and 3 are vertical and <‘s 2 and 4 are also.

Adjacent Angles• Two angles that have the

same vertex, share a common side, and do not overlap.

B U

MS

< BUM and < SUM are adjacent angles.

Corresponding Angles• Angles that have the same

position on two different parallel lines that have been cut (intersected) by a third line (a transversal).

1 2

34

5 6

78

<1 and <5

<2 and <6

<3 and <7

< 4 and <8

Parallel Lines• Two lines in the same plane

that never get any closer to each other, they never meet or intersect.

l m l m

Perpendicular Lines

• Lines that intersect to form right angles.

l

m

l m

Triangle• A polygon with three sides.

Right Triangle• A triangle with exactly one

right angle.

Acute Triangle• A triangle with three acute

angles.

Obtuse Triangle• A triangle with exactly one

obtuse angle.

Scalene Triangle• A triangle with no congruent

sides.

Isosceles Triangle• A triangle with exactly two

congruent sides.

Equilateral Triangle• A triangle with all sides

congruent.

Polygon• A simple closed figure

formed by three or more line segments.

Quadrilateral• A polygon with exactly four

sides.

Pentagon• A polygon with exactly 5

sides.

Hexagon• A polygon with exactly six

sides.

Heptagon• A polygon with exactly

seven sides.

Octagon• A polygon with exactly eight

sides.