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### 15 Cards in this Set

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• Back
 angle factoids -ther are 90 degrees in a right triangle - when two straight lines intersect, angles opposite of each other are equal - there is 180 degrees in a triangle - two lines are perpendicular when tehy meet at a 90 degree angle - there are 180 degrees in a straight line - bisect means to cut directly in half - four sided figures' angles add up to 360 degrees line - a line has no width and extends infinitely ray -extends infinitely in one point but has an endpoint. -the degree measure of the ray is 180 line segment is part of a line and has two endpoints tangent -always perpendicular to the radius square all 4 sides equal all 4 angles each equal 90 degrees area equal a side times another side perimeter equals 4s parallelogram area base times height rectangle area length times width triangle area 1/2 (base x height) triangle perimeter sum of all sides triangle angles -shortest side equals the smallest angle - angles add up to 180 degrees isoscoles triangle two sides are equal, angles opposite to each other add up diameter straight line distance from one point on the circle to another throught the center point =2radius chord -any line segment from one point on the circle to another - the diameter is the largest chord circumference -distance around the outside of the circle - 2 x oi x radius