abigailpowell171108 abigailpowell171108

13-06-2022
Mathematics

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please help!! a regular pentagon ABCDE is shown. work out the size of angle x

please help a regular pentagon ABCDE is shown work out the size of angle x class=

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mani82ebra mani82ebra

13-06-2022

Answer:

36°

A+B+C+D+E=5C=(5-2)×180°=540°

C=540÷5=108°

since BC=CD

x = CDB = ½(180°-C)=½(180°-108°)=½72°=36°

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