Interior Angles
What is the equation for finding the interior angle of a polygon?
180(n-2)
Exterior angles add up to equal how many degrees?
360
What does n stand for?
ex: 180 (n-2)
Number of sides
The sum of the interior angles of a polygon is 900 degrees. Determine the number of sides.
Heptagon (7)
What are Consecutive angles?
Angles that add to 180 degrees and on the same side of the polygon.
What is the sum of interior angles of 4 sided polygon?
360
What is the value of x if the external angle measurements of a quadrilateral (4 sides) with the angle measurements of:
31, 91, 159, x
x = 79
What is the formula for area of a rectangle?
length x width
l x w
If an exterior angle of a regular polygon measures 24 degrees, how many sides does the polygon have?
360/24 = 15
15 sides
What are supplementary angles?
What is the sum of the interior angles of a 7 sided polygon?
900
All polygons, no matter the number of sides, exterior angles add up to equal 180?
True OR False
False
Area of a triangle?
1/2(b x h)
What does bisect mean?
To divide into two congruent parts
In parallelograms and rectangles what is congruent?
opposite sides and opposite angles
What is the value of x in a six sided figure with the following angle measurements?
102, 147, 70, 128, 138, x
x = 135
What formula gives the measure of external angles in a Pentagon (5 sides)?
360/n
360/5 = 72
What does the S in S=(n-2) x 180 stand for?
Sum of interior angles
The diagonals are congruent in what shape?
What does complementary angles mean?
Angles that measure 90 degrees
What is the sum of the interior angles of a 10 sized polygon?
1440
The measure of one interior angle of a regular polygon is 144 degrees. How many sides does it have?
n = 10
180 (n-2) = 144
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n
What is the Pythagorean Theorem?
What is the Pythagorean Theorem?a2+b2=c2
How many sides does an Octagon have?
8
Alternate Interior Angles
Angles on opposite sides of the transversal line intersecting parallel lines