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secondary 4 | E Maths
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Justin Wong Zen Loong
Justin Wong Zen Loong

secondary 4 chevron_right E Maths chevron_right Singapore

how to do?

Date Posted: 3 years ago
Views: 413

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A) BC = EC (given)
AC = FC (given)
ACB = FCE (Vertically oppo angle)
By SAS Test, ABC congruent to FEC

B) from (a),
Angle CEF = angle CBA (by congruency)
Angle BED = 180 - angle CEF
= 180 - 28 (angle on a straight line)
= 152 deg //
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Jasper Eng
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