Algebra
posted by Loren .
Regular pentagon ABCDE is inscribed in circle O. What is the number of degrees in the measure of angle OCE?

Angle EOD=360/5=72
Angle EOC=2*72=144
OCE=(180144)/2=18
Respond to this Question
Similar Questions

geometry
In the diagram, ABCDE is a regular pentagon with the measure of represented by 2x + 1. If the perimeter of the pentagon is 45, find the value of x. 
geometry
1. An exterior angle of a regular polygon measures 30 degrees. What is the measure of an interior angle? 
TrigAlgebra help asap
A regular pentagon is inscribed in a circle whose radius measures 7 cm. Find the area of the pentagon. 
geometry!
ABCDE is a regular pentagon. On the outside of AB, we construct a square ABFG. What is the measure (in degrees) of ∠EAG? 
pentagon...GEOMETRY
ABCDE is a regular pentagon. FAD is an equilateral triangle, such that points F and E are on the same side of line AD. What is the measure (in degrees) of ∠FAB? 
Geometry
ABCDE is a regular pentagon. FAD is an equilateral triangle, such that points F and E are on the same side of line AD. What is the measure (in degrees) of \angle FAB? 
Math
o is the center of the regular pentagon ABCDE. How many degrees are there in OAB? 
calculus
There is a shape first a regular triangle inscribed in a circle, and inscribed in a square, inscribed in a circle, inscribed in a pentagon, etc. so polygon circle polygon circle, etc. the radius of the first circle is 1, find an equation … 
Geometry
Problem: ABCDE$\ is an equilateral pentagon with side length 2 in which angle B= angle E=120 degrees. The area of ABCDE can be expressed in the form square root of x + square root of y for some integers x and y. Find x+y. I don't understand. … 
MATH
A REGULAR PENTAGON ABCDE AND A SQUARE ABFG ARE FORMED ON OPPOSITE SIDE OF AB. FIND ANGLE BCF..