##### Across

**2.**a fraction of a circle**8.**when one event, the other, or both occur**11.**a point that divides a line into two equal parts**14.**if all three sides of a triangle are congruent**15.**a shared side is equal between two figures**16.**if two sides are equal as well as the angle between them**17.**angles that make a straight line**18.**two dimensional closed figure with straight edges**19.**opposite over adjacent**20.**a line that has endpoints on a circle

##### Down

**1.**a transformation that multiplies a figures dimensions**3.**when two events both happen**4.**The measurement of the outer faces of a three-dimensional object**5.**figures that are proportional to each other**6.**another word for equal**7.**all four sides congruent**9.**the probability of one event given that another happens**10.**two pairs of adjacent congruent sides**12.**an angle that is half the central angle**13.**turning a figure about a fixed point