Triangles
What is the interior angle sum of every triangle?
180 degrees
Name 3 quadrilaterals that classify as parallelograms.
Rectangles, Squares, Rhombi
Name a polygon with 7 sides
Heptagon
The formula for a triangle is
What is the formula for perimeter of a rectagle?
What are the 3 angle measurements of a right, isosceles triangle?
90-45-45 degrees
(n-2)*180 is the interior angle sum for any convex polygon, where n = # of sides.
What is the interior angle sum for every quadrilateral?
360 dgrees
(n-2)*180 is the interior angle sum for any convex polygon, where n = # of sides.
If the interior angle sum of the polygon has 720 degrees, how many sides does the polygon have?
6 sides.
Why are the units for area squared?
Two-Dimensional Space
An isosceles trapezoid has a base of 4in, another base of 2.5in, and a side length of 1in. What is the perimeter of the polygon?
8 in.
Two angle measurements in triangle ABC are 87 degrees and 33 degrees. What is the measure of the third angle?
60 degrees
An isosceles trapezoid has two congruent base angles of 70 degrees each. What are the measurements of the other two angles?
Both 110 degrees.
A regular decagon has 10 congruent angles. What is the measurement of each of those angles?
144 degrees
A diagonal segment divides an 18x7 rectangle into two halves. What is the area of one of those halves?
153 units^2
A yard has a fence with 8 sides, measured in feet:
56, 18, 30, 30, 14, 15, 72, and 38.
What is the perimeter of the yard?
273 feet.
The interior angle measurements of an equilateral triangle.
All three measure at 60 degrees.
A quadrilateral with 4 congruent sides, but not all angles are congruent.
Rhombus
The amount of sides a polygon can have is infinite. What does a regular polygon with infinite sides look like?
A cirlce.
A square has an area of 121 feet^2. What are its side lengths?
11 ft.
If the perimeter of a hexagon is 89 units and 5 of the sides are 9, 10, 17, 21, and 28 units, what is the measurement of the 6th side?
4 units