Angles All Around
This is an angle whose measure is between 0 and 90 degrees.
What is an acute angle?
This is a triangle with three angles whose measures are less than 90 degrees.
What is an acute triangle?
These are lines that lie in the same plane and do not intersect.
What are parallel lines?
This is a polygon with five sides.
What is a pentagon?
This is the distance around a circle, found by using the formula C=2πr.
What is circumference?
This is an angle whose measure is between 90 and 180 degrees.
What is an obtuse angle?
This is a triangle with one angle that measures 90 degrees.
What is a right triangle?
These are lines that intersect and form right angles.
What are perpendicular lines?
This is a polygon with six sides.
What is a hexagon?
This is the ratio of the circumference of any circle to its diameter. It is approximately 3.14159.
What is pi?
This is an angle whose measure is 90 degrees.
What is a right angle?
This is a triangle with an angle that measures between 90 and 180 degrees.
What is an obtuse triangle?
This is the sum of the length of a polygon's sides.
What is perimeter of a polygon?
This is a polygon with eight sides.
What is an octagon?
This is a segment with one endpoint on the end of a circle and the other endpoint at the center of the circle.
What is a radius of a circle?
These are two angles whose measures sum up to 90 degrees.
What are complementary angles?
This is a triangle whose sides are all congruent.
What is an equilateral triangle?
This is the set of points that two or more geometric figures have in common.
What is an intersection?
This is a polygon with nine sides.
What is a nonagon?
This is the set of all points in a plane that are a given distance, the radius, from a given point, the center.
What is a circle?
These are two angles whose measures sum up to 180 degrees.
What are supplementary angles?
This is a triangle that has at least two congruent sides called legs.
What is an isosceles triangle?
This is formed whenever two rays share a common endpoint.
What is an angle?
This is a polygon with ten sides.
What is a decagon?
This is a segment that contains the center of the circle and whose endpoints are on the circle.
What is a diameter of a circle?