Vocabulary
This is a line that intersects a circle at exactly one point?
What is a tangent?
Formula for the area of a rectangle
What is A = l × w?
Tool used for drawing arcs and circles
What is a compass?
The distance from the center of a circle to any point on the circle
What is the radius?
A triangle with one angle equal to 90 degrees.
What is a right triangle?
A polygon with all sides and angles equal
What is a regular polygon?
Formula for the circumference of a circle.
What is C = 2πr?
Used to draw straight lines and measure angles.
What is a straightedge?
A line segment passing through the center and touching both sides of a circle.
What is the diameter?
A triangle with two equal sides and two equal angles.
What is an isosceles triangle?
An angle less than 90 degrees.
What is an acute angle?
Formula for the area of a triangle
What is A = 1/2 × b × h?
This construction finds the exact middle of a segment.
What is a perpendicular bisector?
A portion of the circumference of a circle.
What is an arc?
Sum of the interior angles in any triangle.
What is 180 degrees?
Two angles whose sum is 180 degrees
What is a supplementary angle?
Formula for the volume of a cylinder.
What is V = πr²h?
This construction creates an angle of exactly 90 degrees.
What is a right angle or perpendicular line?
A region bounded by two radii and the arc between them.
What is a sector?
The longest side of a right triangle.
What is the hypotenuse?
A triangle with no equal sides
What is a scalene triangle?
Formula for the Pythagorean Theorem
What is a² + b² = c²?
This construction divides an angle into two equal parts.
What is an angle bisector?
A line that touches a circle at exactly one point.
What is a tangent?
A triangle with all angles less than 90 degrees.
What is an acute triangle?