Triangles
What is the interior angle sum of all triangles?
180 degrees
(n-2)*180 is the interior angle sum for any convex polygon, where n = # of sides.
How many degrees are inside of every quadrilateral?
360 degrees
Heptagon
The formula for area of a triangle
1/2b*h
The formula for perimeter of a rectangle:
What are the angle measurements of a right, isosceles triangle?
90-45-45 degrees
Which 3 quadrilaterals classify as parallelograms?
Square, rectangle, rhombus
(n-2)*180 is the interior angle sum for any convex polygon, where n = # of sides.
What is the interior angle sum of a polygon with 9 sides?
126 degrees
Why are the units squared for area?
Two dimensional space
A fenced in yard has 6 sides, measured in ft.:
Lengths: 56, 17, 17, 30, 44, and 50.
What is the perimeter?
214 ft.
If two angles inside a triangle measure at 87 and 13 degrees, what is the measure of the third angle?
80 degrees
An isosceles trapezoid has two congruent base angles of 70 degrees; what are the other two angles?
both 110 degrees
If a regular decagon has 10 congruent angles, what are the measurements of each of those angles?
144 degrees
If a diagonal segment cuts an 18x7 rectangle into two congruent triangles, what is the area of each of those triangles?
63 units^2
An isosceles trapezoid has a base of 8 in, another base of 12.5 in, and a side of 1 in.
What is the perimeter?
22.5 ft.
Equilateral triangles have interior anlge measures of:
all 60 degrees
Which quadrilateral has four congruent sides, but not 4 congruent angles?
Rhombus
If the interior angle measure sum of a polygon is 720 degrees, how many sides does it have?
6 sides
If the area of a square is 121 ft^2, what are the side lengths?
11ftx11ft
A pentagon has a perimeter of 350 ft. Four of its sides measure at 78, 20, 26, and 89 ft.
What is the length of the fifth side?
137 ft.