D The diagram shows an ornament which is made of wire. It consists of a regular pentagon, ABCDE, of side 4cm, five equal semicircles with diameter 4 cm and an outer circle, centre 0. Each semicircle touches the outer circle as shown. (a) Find the length of the perpendicular from O to AB.

Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
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E
The diagram shows an ornament which is made of wire.
It consists of a regular pentagon, ABCDE, of side 4cm, five equal semicircles with diameter 4 cm
and an outer circle, centre O.
Each semicircle touches the outer circle as shown.
(a) Find the length of the perpendicular from O to AB.
Transcribed Image Text:E The diagram shows an ornament which is made of wire. It consists of a regular pentagon, ABCDE, of side 4cm, five equal semicircles with diameter 4 cm and an outer circle, centre O. Each semicircle touches the outer circle as shown. (a) Find the length of the perpendicular from O to AB.
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