Geometry Flashcards
How many degrees are in a right angle?
90
How many degrees are in a straight line?
180
What happens when two lines meet and they are considered perpendicular?
They meet at a 90 degree angle
What does bisect mean?
To cut exactly in half
How many total degrees do each of the angles in a triangle add up to?
180
How many total degrees do each of the angles in a four sided figure add up to?
360
What size angle is opposite the longest side of a triangle?
The largest angle
What size angle is opposite the the shortest side of a triangle?
The smallest angle
What is the formula for the Area of a triangle?
Area= 1/2 base x height
What does height constitute on a triangle?
The distance from the base of the triangle to its highest point
What is an isosceles triangle?
A triangle whose two side lengths are equal and the two angles opposite the equal sides are of equal degree
What is an equilateral triangle?
A triangle whos three sides are equal and all three angles measure 60 degrees
What is a parallelogram?
A four sided figure that has equal length opposite sides that are parallel and opposite angles have equal measures
What is the formula for the area of a parallelogram?
Area= base x height
What is a rectangle?
A parallelogram whose 4 angles measure 90 degrees
What is the formula for the area of a rectangle?
Area= Length x width
What is the formula for the perimeter of a rectangle?
Perimeter= 2(length) + 2(width)
What is a square?
Rectangles that have 4 equal sides
What is the formula for the area of a square?
Area= Side (squared)
What is the formula for the perimeter of a square?
Perimeter= 4(side)
How many degrees are in a circle?
360
What is the radius of a circle?
The distance from the center of the circle to the outside perimeter
What is the diameter of the circle?
The distance from the perimeter of the circle through the center to the other side of the perimeter
What is the chord of a circle?
Any line segment connecting two points on the edge of a circle. This also includes the diameter
What is the formula for the circumference of the circle?
C= (pie)(diameter)
What is the arc of a circle?
The arc is a length of the circumference between two points
What is the formula for the area of a circle?
Area=(Pie)(Radius)(Squared)
How long does a line extend for?
Infinity
What is a ray?
A line that extends to infinity from one end point
What is a line segment?
A portion of a line between two end points
What is the formula for the Pythagorean Theorem?
a(squared) + b(squared) = c(squared)
