Polygons
Define quadrilateral.
A quadrilateral is a four sided polygon.
If two sides of a triangle have equal lengths, what is true about the angles opposite those sides?
The angles are also equal.
If two sides of a triangle have equal lengths, what is true about the angles opposite those sides?
The angles are equal.
The diameter is twice the ____________
Radius
The side of square is 6 in. What is the area?
36 in2
A pentagon has how many sides?
5
Define acute angle
An angle that measures less than 90 degrees
Define equiangular triangle
A triangle with three equal angles
The perimeter of a circle is called the ____________
Circumference
The area of a square is 25 in2, what is its perimeter?
A decagon has __________ sides.
10
What is the measure of a straight angle?
180 degrees
What are the measures of the angles of an equilateral triangle?
60 degrees
What is the formula for the area of a circle?
A = pi r2
If the perimeter of a square is 40 cm, what is the area of the square?
100 cm2
A nine sided polygon is called a ______________
Nonagon
What type (not measure) of angle is formed by two right angles?
Straight Angle
A triangle with no equal sides is called a ____________ triangle.
Scalene
What is the circumference of a circle with a radius of 8?
16 pi
The formula 2AB + PB * H represents what?
The surface area of a geometric prism.
A polygon that has all equal sides and all equal angles is referred to as a _________________ polygon
Regular
What angles are formed by lines that are perpendicular?
Right Angles
If the height of a triangle is 10 and the area is 25, what is the length of the base of the triangle?
5
If the area of a circle is 49pi, what is its diameter?
14
What is the formula for the area of a trapezoid?
A = 1/2 * (b1+b2) * h